Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS - Manual (Page 36)

Commercial Pool Heaters
36
IIN NS ST TA AL LL LA AT TIIO ON N Continued
Ensure that the pump installed on the pool heater will supply
adequate flow to make the flow switch contacts and operate the
pool heater. A water flow switch meets most code
requirements for a low-water cut off device on appliances
requiring forced circulation for operation.
PUMP PURGE /
MAINTENANCE TIMER
OPTION
Pump Purge Delay Option
An electronic pump purge option is available for this pool
heater. During extended periods of inactivity during which
pumping may have been turned off to conserve energy, air can
become entrapped in the piping. The pump purge option
delays pool heater operation until the pump has been on for
sufficient time to remove air from piping. Both the inactivity
time and pump purging time are adjustable.
The inactive timer is adjustable from 1 - 99 hours. Selection
of a time between 4 - 8 hours is recommended.
The purge timer is adjustable from 1 - 60 minutes. Selection
of a time between 10 to 30 minutes is recommended.
An override toggle switch is provided to turn off the pump
purge feature for testing or should the option no longer be
desired. When turned off, the call for heat will not be delayed.
Service Indicator Option
A service indicator option is available for this pool heater. The
Service Indicator light on the Diagnostic Information Panel
will light up indicating that the pre-programmed hours/cycles
have elapsed. Contact a qualified serviceperson to perform
service on the pool heater.
CONNECTING TO
ELECTRICAL SUPPLY
This pool heater is wired for 120 VAC service. The pool heater,
when installed, must be electrically grounded in accordance
with the requirements of the authority having jurisdiction or in
the absence of such requirements, with the latest edition of the
National Electrical Code ANSI/NFPA No. 70. When the pool
heater is installed in Canada, it must conform to the CAE
C22.1, Canadian Electrical Code, Part 1 and/or local Electrical
Codes.
1. Use only Type-T wire [63°F (35°C) rise] on all wiring
between the pool heater and field-installed devices.
2. Enclose line voltage wire exterior to the pool heater in
approved conduit or approved metal-clad cable.
3. The pump must run continuously when the pool heater is
being fired.
4. To avoid serious damage, do not energize the pool heater
until the system is filled with water.
5. Provide the pool heater with the proper overload
protection.
3-Way Automatic Bypass Valve Wiring
If the piping loop was disassembled for shipping or needs to be
fitted with an outdoor enclosure, connection or disconnection
of the 3-way automatic bypass valve will be required. Wiring
connections should be made to the appropriately numbered
terminals on the 3-way automatic bypass valve as follows:
- Yellow to terminal #1
- Blue to terminal #2
- White with a red stripe to terminal #3
- Pink to terminal #4.
Note: Orientation of the valve connections may vary from
what is shown. Care should be taken to ensure wires are
connected to the appropriate terminals, see Figure 33 on
page 32 of this manual.
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WARNING: Power must be removed and the
clutch button must be depressed before
attempting to manually operate the valve or
damage to the 3-way valve may occur.
IMPORTANT: Do not block access to the
electrical cover plate when installing electrical
conduit.