INSTALLATION
Rev. 10/06
PrecisionTemp, Inc • 11 Sunnybrook Drive • Cincinnati, Ohio, 45237 • 1-800-934-9690 • fax 513-641-0733
must be a gas line of at least ¾” NPT or equivalent ID. A manual gas shut-off valve must be
installed in the gas line, located within an accessible area of the booster heater. The gas line
should be kept as short as possible and installed in a way to protect it from damage. ( Inlet natural
gas pressure must be minimum 7wci., maximum 10.5 wci.)
When making pipe connections use an approved pipe dope, taking care not to use excessive
amounts as to foul the gas valve. When tightening the gas line always support the gas valve to
avoid damage to the gas train.
(In a propane installation the gas must be supplied from a regulated source and pressure to the
booster heater must be minimum 11 wci. maximum 14 wci.).
When making connection to the booster unit, take care to start the gas line fitting by hand and
tighten by hand to avoid cross threading. Then tighten with a wrench, taking care not to damage
any internal components of the unit.
After making the final connection of gas, with power to the unit turned off, check all gas line fittings
for leaks using a liquid test solution. NEVER use a flame to test for leaks. Observe all local
codes regarding gas line installation and specifications.
NOTE: The appliance and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of 1/2 PSI
(3.5 kPa). All air should be purged from gas line prior to startup.
6. Flue Installation
The PrecisionTemp Gas Booster Heater must be installed in conformance with local codes or in
the absence of local codes, the National Fuel Gas Code, ANSI Z 223.1.
The unit is delivered from the factory to be flued from the right side of the case with combustion
air being brought in from the rear cut out on the right side of case.
A 4” stainless rigid type vent pipe such as category 3, Z-Vent-II or equivalent is recommended for
the flue. Flue pipe can be run up to 70’ with 4” pipe from the unit to a proper roof or wall flue
terminus. If using optional 3” rear flue, the maximum flue pipe run should be 40’
( each 90°elbow
adds 10
′
to pipe length).
If code permits, flue should be run into the dish hood installed
over dish machine.
If this is done, provisions must be made to secure its installation and
electrical interlock must be provided in some jurisdictions to assure the booster does not operate
unless the dish hood is operating. It is recommended to check local codes.
7.
Installation Completed
Once installation is completed Start-Up and testing must be done in accordance with the Factory
Authorized Start-Up Procedure by a qualified Service Technician.
