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K. Combustion Chamber: The combustion chamber wrapper shall be insulated to reduce standby
radiation losses, reduce jacket losses and increase unit efficiency.
L. Cabinet
1. The corrosion-resistant galvanized-steel jackets shall be finished with a baked-on powder
coat, which is suitable for outdoor installation, applied prior to assembly for complete
coverage, and shall incorporate louvers in the outer panels to divert air past heated surfaces.
2. The pool heater(s), if located on a combustible floor, shall not require a separate combustible
floor base.
3. The pool heater(s) shall connect both the combustion air and flue products through the back of
the unit.
4. The heater shall have as standard an internal, combustion air filter rated to MERV 8 (>95%
arrestance).
M. Pool Heater Pump – Heater equipped with factory-packaged pump system.
N. Cold Water Protection System
1. The heater(s) shall be configured with a cold water protection automatic proportional bypass
system that ensures the primary heat exchanger will experience inlet temperatures in excess
of 120ºF in less than 7 minutes to avoid damaging condensation.
2. The cold water protection system shall be configured with one variable-speed pump that is
controlled by a system-matched PID control that injects the correct amount of cold water
directly into the heater loop to maintain the required minimum inlet temperature. The PID
controller temperature sensor shall be located in the inlet header of the heater.
Specifier Note: The remaining item(s) in this section are options. Delete those that are not being
specified.
O. PVC Vent Adapter
1. The pool heater(s) shall be configured with a PVC vent adapter that allows for the use of PVC
vent material with the pool heater return water temperature does not exceed 104ºF. The PVC
vent adapter shall be factory mounted to the pool heater flue outlet and the vent termination
adapter shall be shipped loose inside of the pool heater crating for field installation.
2. The PVC vent adapter shall include a 162ºF flue temperature limit mounted to the pool heater
flue outlet and interlocked into the pool heater safety circuit.
3. The pool heater shall also have a 175ºF manual high limit factory mounted into the pool
heaters outlet header and interlocked into the safety circuit of the water heater.
2.3 POOL HEATER OPERATING CONTROLS
A. The pool heater(s) shall feature a modulating digital controller, mounted and wired.
B. System water sensor shall be shipped loose for field-installation by installing contractor.
Inlet/Outlet sensors are factory-installed.
2.4 DIRECT VENT
A. The pool heater(s) shall meet safety standards for direct vent equipment as noted by the 2006
Uniform Mechanical Code, section 1107.6, and ASHRAE 15-1994, section 8.13.6.
2.5 SOURCE QUALITY CONTROL
A. The pool heater(s) shall be completely assembled, wired, and fire-tested prior to shipment from the
factory.
B. The pool heater(s) shall be furnished with the sales order, ASME Manufacturer’s Data Report(s),
inspection sheet, wiring diagram, rating plate and Installation and Operating Manual.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Must comply with:
1. Local, state, provincial, and national codes, laws, regulations and ordinances
2. National Fuel Gas Code, ANSI Z223.1/NFPA 54 – latest edition
3. National Electrical Code, ANSI/NFPA 70 – latest edition