York Ymbe User Manual

FAN COIL  
AIR CONDITIONERS  
NEW RELEASE  
Form 115.20-NOM4 (105)  
INSTALLATION, OPERATION, & MAINTENANCE  
MODELS: YMB, YMB-HW, YMBE  
YMB Series  
(2-pipe, cooling and heating)  
(Replaces the MH Series)  
YMB-HW Series  
(4-pipe, cooling and heating)  
(Replaces the MH-HW Series)  
YMBE Series  
(2-pipe, cooling with electric heat)  
(Replaces the MHE Series)  
00781VIP  
LD07966  
(See page 3 for details)  
Notes:  
1. For proper operation, control valve must be normally closed.  
2. Aquastats provided where required.  
3. Electric Heat is only available in the YMBE series. These units require a remote thermostat (low voltage 4 wire thermostat).  
***** WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER *****  
Altering the product or replacing parts with non-authorized factory parts voids all warranty or  
implied warranty and may result in adverse operational performance and/or a possible hazardous  
safety condition to service personnel and occupants. Company employees and/or contractors are  
not authorized to waive this warning.  
L23954Y 1-05  
FORM 115.20-NOM4 (105)  
INSTALLATION  
RECEIVING  
HORIZONTAL APPLICATION  
Material in this shipment has been inspected at the  
factory and released to the transportation agency in  
good condition. When received, a visual inspection of  
all cartons should be made immediately.Any evidence  
of rough handling or apparent damage should be noted  
on the delivery receipt and the material inspected in  
the presence of the carrier’s representative.  
These fan coil units are factory assembled for horizon-  
tal left side down application without any modification  
required. To convert to horizontal right side down,  
remove horizontal drain pan andA-coil assembly, flip  
horizontal drain pan over to right side and reinstall  
horizontal drain pan and A-coil into cabinet. Secure  
forward edge of horizontal drain pan with angle  
bracket. The unit should be leveled in such a way  
that there is slope toward the condensate drain nipple  
to assure positive drainage.  
If damage is found, a claim should be  
filed against the carrier immediately.  
WIRING  
All wiring must comply with the local and national  
code requirements. Units are provided with wiring  
diagrams and nameplate data to provide information  
required for necessary field wiring. All wiring must  
comply with local and national code requirements.  
STORAGE  
If the equipment is not to be immediately installed,  
store it in a dry location with the motor protected  
against moisture, dust, corrosion and physical dam-  
age.  
Any devices such as fan switches or  
thermostats that have been furnished  
by the factory for field installation  
must be wired in strict accordance  
with the wiring diagram that is sup-  
plied with the unit. Failure to do so  
could result in damage or injury.  
DESCRIPTION  
The YMB Series 2-pipe fan coil comes with a 4-row  
cooling / heating coil and a 120V multi-speed mo-  
tor.  
The YMBE Series 240V, 2-pipe fan coil comes with a  
4 row-cooling coil, 240V multi-speed motor, 240/24  
transformer, and up to 25kW of factory installed elec-  
tric heat. Models with more than 10kW also include a  
circuit breaker for branch circuit protection. Control  
voltage is 24V.  
YMBE SERIES  
Fan coil units with 10kW or less electric heat are  
provided with a terminal block for connection of one  
electrical service. Units with 15 kW and 20kW are  
provided with dual circuit breakers for the connection  
of two electrical services and units with 25kW are pro-  
vided with three circuit breakers for the connection of  
three separate electrical services (see Figure 2 & 3).  
The YMBE Series fan coil comes with a 4-row cool-  
ing coil, 277V multi-speed motor, and up to 10kW of  
factory installed heat. A unit mounted disconnect is  
standard.  
These units may be provided with a class 2 transformer  
for 24-volt control circuits. Should any add-on equip-  
ment also have a class 2 transformer furnished, care  
must be taken to prevent interconnecting outputs of  
the two transformers by using a thermostat with iso-  
lating contacts.  
TheYMB-HW Series 4-pipe fan coil includes a 4 row  
cooling coil, a 2, 3, or 4 row heating coil installed in  
the reheat position, and a 120V multi-speed motor.  
3
YORK INTERNATIONAL  
 
FORM 115.20-NOM4 (105)  
INSTALLATION  
 
 
 
�  
 
�  
 
 
 
 
 
�  
�  
 
�  
 
 
 
�  
 
�  
FIG. 2 – YMBE WIRING CONNECTIONS,  
15 & 20 KW  
FIG. 3 – YMBE WIRING CONNECTIONS, 25 KW  
�� �  
 
�� �  
�  
�  
 
�  
�  
 
���  
�  
�  
�  
�  
�  
�� �  
 
�  
���  
����  
�  
�  
�  
 
�  
��  
� ��  
�  
 
�  
��  
�  
FIG. 4 – STANDARD LOW VOLTAGE WIRING  
�  
�  
FIG. 5 – T200 THERMOSTAT W/CONTROLLER  
OPTION  
4
YORK INTERNATIONAL  
FORM 115.20-NOM4 (105)  
INSTALLATION  
YMB, YMB-HW:  
YMBE:  
1) Separate cooling and heating coils (4 row cooling  
coil)  
1) Factory installed electric heat  
2) 208/240 volt Motor  
3) 240/24 transformer  
2) 120V multi-speed motor.  
3) Vertical / Horizontal drain pan (right-to left and left-to  
right airflow)  
4) Circuit breaker disconnect (above 10 kW)  
5) Manual air vent  
4) Manual air vent  
5) Throw away filter  
6) Throwaway filter  
7) Vertical / Horizontal drain pan (right-to left and left-to  
right airflow)  
8) 277 available / 10 kW maximum  
 
���  
�  
 
�  
 
�  
�  
�  
�  
�  
 
�  
�  
�  
���  
�  
�  
�  
�  
 
���  
�  
�  
�  
DRAIN CONNECTION PRIMARY AND  
SECONDARY DRAIN ARE 3/4" MPT  
FIG. 5 – YMB, YMB-HW, YMBE DIMENSIONS  
TABLE 2 – PHYSICAL DIMENSIONS (INCHES)  
MODEL  
A
B
C
D
E
F
2
2
G
H
FILTER SIZE  
8YMB  
8YMB-HW  
8YMBE  
40 20  
42 23  
42 23  
20  
20  
20  
18-1/2  
21-1/2  
21-1/2  
16  
16  
16  
18  
18  
16  
19  
18 X 20 X 1  
12YMB  
10/12YMB-HW  
20 X 22 X 1  
20 X 25 X 1  
12YMBE  
2
2
18  
18  
17  
24  
16/20YMB  
16YMB-HW  
48 28 21-1/4 26-1/4 17-1/4  
16/20YMBE  
20YMB-HW  
48 23 21-1/4 22-1/4  
17  
2
2
19-7/8 18-1/2  
22 24  
52 28 25-1/4 26-1/2 21-1/4  
14 X 24 X 1  
(2 REQUIRED)  
5
YORK INTERNATIONAL  
FORM 115.20-NOM4 (105)  
INSTALLATION  
PIPING  
• Heat can only be applied to the cup of the valve  
body for a min i mal time before damage occurs  
(even with the use of wet rags.  
The supply and return piping must be adequately sized  
to meet the design water flow requirements as specified  
for the specific installation (see table 3 for connection  
sizes). All chilled water piping must be insulated to  
prevent condensation. It is also recommended that all  
piping be insulated to prevent freezing when piping is  
run in an unconditioned space.  
• Avoid rapid quenching of solder joints, as this  
will produce joints of inferior quality.  
• Connect all piping per accepted industry  
standards and observe all regulations governing  
installation of piping systems. When all  
connections are complete, the system must be  
pressure tested. Repair any solder joint leaks and  
gently tighten any leaking valve packing nuts  
and piping accessories as required. Hydronic  
systems are not designed to hold pressurized air  
and should only be tested with water.  
Coil freeze protection is recommended  
for applications where the fan coil is  
located in ambient air locations (attics,  
crawl spaces, etc.) or within structures  
that may be unoccupied during freez-  
ing conditions. Consult the factory for  
additional information.  
When connecting piping or valve  
kits to fan coil units, do not bend or  
reposition the coil header tubing for  
alignment purposes. This could cause  
a tubing fracture resulting in a water  
leak when water pressure is applied  
to the system.  
PIPING PRECAUTIONS  
• Flush all piping prior to connection to remove  
all debris.  
• Use wet cotton rags to cool valve bodies when  
soldering.  
• Open all valves (midway for hand valves,  
manually open on motorized valves) prior to  
soldering.  
DRAIN PIPING  
Condensate drain lines must be installed with adequate  
slope away from the unit to assure positive drain age.  
Since the drain pan is located on the suction side of  
the blower, a negative pressure exists at the drain pan  
and a minimum trap of 1-1/2 inches must be provided  
in the drain line to assure proper drainage.  
• Whensolderingtobronzeorbrass,heatthepiping  
while in the socket/cup and begin introducing the  
solder when the flux boils rapidly. Avoid direct  
flame into the solder joint.  
Drain connections, primary and secondary, are 3/4"  
MPT.  
TABLE 3 – COIL CONNECTIONS  
COOLING COIL CONNECTIONS (INCHES)  
YMB, YMBE, YMB-HW  
SIZES 8, 10, 12  
SIZES 16, 20  
7/8" ODS  
1-1/8" ODS  
HEATING COIL CONNECTIONS (INCHES)  
YMB-HW  
SIZES 8, 10, 12, 16  
SIZE 20  
7/8" ODS  
1-1/8" ODS  
6
YORK INTERNATIONAL  
 
FORM 115.20-NOM4 (105)  
FAN COILS START-UP CHECKLIST  
INSTALL CHECKLIST  
Equipment received as ordered.  
Unit checked for damage interior and exterior.  
Make sure all ductwork is complete and available for full air flow.  
Unit installed level to ensure proper drainage and operation.  
Unit installed with proper clearances.  
Ensure condensate water will drain toward the drain connection. An overflow drain may be required as a back up to a clogged  
primary drain.  
Check that coil(s), valves and piping have been leak checked and insulated as required.  
Main coil drain pan must be properly trapped and charged with water before units are started.  
Ensure that all air has been vented from the system.  
Return valves to their proper operating positions prior to start-up.  
Repair any solder joint leaks and gently tighten any leaking valve packing nuts and piping accessories as required.  
Install all panels.  
CLEANING CHECKLIST  
Installer has cleaned out interior.  
Ensure drain pan free from foreign material.  
Ensure air filters are clean, installed properly and secured. Use the directional arrows or other information on the filter to  
determine the proper flow direction.  
CONTROLS CHECKLIST  
Check that supply voltage matches nameplate data.  
Ensure that the unit is properly grounded.  
Controls installation complete  
Check all electrical connections for tightness.  
Review electrical print for correct wiring.  
Fan INSPECTION - The fan should be inspected and cleaned, in conjunction with maintenance of the motor and bearings. It is  
important to keep the wheel clean in order to avoid imbalance and vibration.  
Check tightness of fan bearing locking collar.  
With power off, check blower wheel set screws for tightness and ensure that the blower wheel(s) rotate freely and quietly.  
Check tightness of all motor base and mounting bolts.  
Check motor connections to ensure that they are secure and made in accordance with the wiring diagram  
Rotate all moving components manually. Adjust as required.  
NOTE: If the motor and fan have not been operated in the last (4) four weeks or more, lubricate all the bearings and rotate the motor and fan  
monthly to prevent moisture from accumulating in the bearings. (See Form 50.20-NM3, Long Term Storage)  
7
YORK INTERNATIONAL  
MAINTENANCE  
MOTOR  
The blower motor should be cleaned annually and if it  
has oiling ports, it should be oiled with a good grade  
of SAE 20 oil. Normally a few drops of oil in each  
bearing is sufficient.  
Divide the total number of units on the job into six  
equal groups. Each week inspect, clean or replace  
the filters in each group, in rotation. This insures  
a uniform servicing interval. The interval may be  
lengthened or shortened as determined by experience.  
If inspection shows only the room-air filter to be dirty,  
this one alone should be replaced.  
COIL  
The coil must be kept clean by any of the following  
methods.  
Dirty filters reduce the air and heat-  
ing capacities of the Unit Ventilator.  
When the filters are excessively dirty,  
the unit heating capacity will be so re-  
duced that it is ineffective for heating  
the room. When a room fails to heat,  
always check the filters.  
1. Cleaning with low-pressure compressed air.  
2. Flushing or rinsing with water (a detergent is  
advisable for greasy surfaces).  
FILTERS  
Clean or Replace Air Filters Regu-  
larly  
CLEAN UNIT INTERIOR  
Once a year clean the fans and coils of the unit thor-  
oughly. Remove the access panel as necessary.  
Wipe the interior of the unit clean with a rag. Wipe  
the motor and inside and outside of the fan housings.  
(In cooling units, clean out the drain pan.)  
The intervals at which filters require replacement  
depend on local conditions.  
Because of dust and lint in the room, room-air filters  
load up much more rapidly than outdoor-air filters.  
Under normal conditions, the room air filter requires  
replacement every six to eight weeks.  
To ensure proper maintenance of the filters, it is best  
to follow an organized maintenance procedure. The  
following one is recommended:  
Tele. 800-861-1001  
P.O. Box 1592, York, Pennsylvania USA 17405-1592  
Copyright © by York International Corporation 2004  
Subject to change without notice. Printed in USA  
ALL RIGHTS RESERVED  
Form 115.20-NOM4 (105)  
New Release  

Lexicon Digital Controller Mc 12 User Manual
Lexmark Gd2 User Manual
Philips Sbchp195 User Manual
Philips Ss191p User Manual
Ricoh Fax 2050l User Manual
Sears Kenmore 66162453 User Manual
Subaru Robin Power Products Automobile Parts Pub Ep User Manual
Trane Rt Prc010 En User Manual
Trane Xe1200 User Manual
Whirlpool Acc602 User Manual