Electric,
Water Circulation Heater
Applies to Heater Model EPW
Installation/Operation/Maintenance Form MI511
Figure 1
DIMENSIONS
1.0 INITIAL INSPECTION
HOLDING BOLTS
FOR BRACKET
29"
1 1/2" OUTLET
1.1 Upon receipt from the carrier, inspect the heater
for possible damage in transit.If necessary, immediately
report damage to shipping company.
11 3/4"
1 1/2" INLET
1.2 Verify that the nameplate voltage, phase, wattage
and catalog number comply with the order.
15"
22 1/2"
1.3 The EPW, when configured:
• as a swimming pool heater, has a catalog
number EPWP;
• as a domestic water or dishwasher water
booster heater, has a catalog number EPWD;
• as a hot water furnace for comfort or process
water heating, has a catalog number EPWH.
10 3/4"
Knockouts 1",
1 1/4", 1 1/2 & 2"
7 1/2"
1 1/2" DRAIN
16 1/4"
7 1/2"
4"
15"
2.6 Allow space at sides for the conduit used for power
supply and for thermostat or optional equipment wiring.
These units differ in trim package, i.e.auxiliary controls.
For this reason IT IS IMPORTANT THAT THE UNITS
BE USED ONLY FORTHE SPECIFIC APPLICATIONS
AS STATED ABOVE.
2.7 Please refer to Figure 2 for component location and note
the following:
2.7.1 The circulation pump outlet is connected to the heater
inlet located at the end of the unit opposite to the controls
compartment.
2.0 INSTALLATION
2.1 The heater must be installed by qualified
personnel to code requirements.
2.7.2 A flow switch (optional) is to ensure that the heater will
not be energized if the flow is interrupted. Installations
requiring a flow switch include:
(a) Swimming pool heating systems where the heater
is positioned above the pool water surface.
2.2 Ensure that the electrical power supply is the
same voltage and phase as the heater with sufficient
current capacity.
(b) Whenever the plumbing allows for the heater to be
isolated by shut off valves on the inlet and outlet.
(c) Systems where the heater vessel is allowed to drain
when flow is interrupted. (Without water the built-in limit will
not perform as intended).
2.3 The heater must be installed in a horizontal
position with the outlet at the top and the drain at the
bottom.
2.4 The mounting hardware, as provided, is suitable
for either floor or ceiling mounting. Note that each
mounting bracket is to be attached at the top of the
heating housing by two holding bolts (see Fig.1).
Remove the two bolts and install the first mounting
bracket prior to removing the second two bolts to install
the second mounting bracket. If all bolts are removed
at once the tank may shift which will increase installation
time.
(d) Systems where the temperature control bulb is
located away from the outlet.
If a flow switch is not used, and also for pool heating, it is best
to allow the circulating pump to run continuously.
2.7.3 Wire both flow switch and control thermostat to contacts
designated "normally open" and "common". "Normally open"
contacts open on temperature rise on thermostat and close
on flow through switch.
2.5 Please refer to Figure 1 for dimensions. Be sure
to provide adequate space to facilitate installation and
maintenance. Leave a minimum of 24" (60cm)
clearance at the control compartment (opposite side
to the inlet). If the unit is to be mounted under a table or
cabinet a minimum of 30" (75cm) from the floor to the
underside of the cabinet is required for piping.
2.7.4 A pressure relief valve is a safety feature which is
intended to open when the system malfunctions or is
improperly operated or maintained. Units equipped with a
pressure relief valve should be fitted with piping to direct the
discharge down and away from personnel or equipment.
NEVER INSTALL A SHUT OFF VALVE ON EITHER SIDE
OF A PRESSURE RELIEF VALVE.
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3.6 The built-in temperature high limit is factory set at
180°F (82°C).This control works best when it is set about
40°F (22°C) above the water outlet temperature.To adjust
the limit control setting remove the small panel on the limit
control to access the adjustment screw. Under normal
operation the heater should not cycle on the limit control.
Figure 4
Accessories
Protective Well
CWI-6
1/2" NPT
3.7 If the limit trips it must be manually reset before the
heater will operate. Prior to reset, the condition(s) which
caused the trip shall be corrected.
4.0 MAINTENANCE
5' (1.5m)
Capillary
4.1 Service to the unit shall only be done when the power
is disconnected at the mains.
4.2 After the first few days of operation, and periodically
thereafter, inspect for piping leaks and loose electrical
connections.
Thermostat
11B06-1
4.3 The EPWD unit, because it is used in an open loop
water heating system, may be subject to sludge build-up if
the water is hard and untreated.This unit must be drained
at regular intervals (depending on water conditions and
operating time) to remove sludge. Once a year a flange
heater must be removed and the vessel inspected and
cleaned as required. Local conditions may cause this
inspection time to vary.
Control Circuit Fuse:
208 & 240V: 2 x MDA 3, 3 AMP,
277 to 600V: 1 x MDA 5, 5 AMP
Figure 3
Wiring Diagram
3φ
1φ
To Remote
Thermostat
(supplied loose)
Disconnect
Switch
(not supplied)
TYPE F61KB FLOW SWITCH
(Optional)
N.B.
REMOVE JUMPER IF OPTIONAL
FLOW SWITCH IS USED.
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