Initial Start Up - Polaris PG10/GHX Instruction Manual

INITIAL START UP

REQUIRED TEST EQUIPMENT
• One U-tube manometer, recommended ranges; 0-14" W.C. (0-
3.5 kPa) and 0-35" W.C. (0-8.7 kPa) or pressure gauges.
• One digital manometer can be used in place of U-tube
manometers or pressure gauges. Recommended ranges;
-14.00 to +14.00" W.C. (0-3.5 kPa) resolution 0.01" W.C. and
0-35" W.C. (0-8.7 kPa) resolution 0.10" W.C.
NOTE: All test equipment must be acclimated to ambient
temperature before calibration and use.
PREPARATION
1. Using the control system menus, change the Operating Set
Point to the lowest temperature setting, see Operating Set
Point And Differential Adjustment on page 38.
2. Turn the water heater's Enable/Disable switch to the "Disabled"
position.
3. Close the manual gas shut off valve, see Figure 36 on page 30.
4. Wait five (5) minutes for any residual gas to clear.
5. Connect the manometer to the supply gas pressure port on the
gas control valve, see Figure 40 and Figure 41.
On the water heaters covered by this manual there are test
ports for supply and manifold gas pressure readings on the gas
control valve. Using a small flat tip pocket screw driver - open
the needle valve inside the supply gas pressure test port one
full turn only; turn the needle valve screw counter-clockwise to
open the valve. Slide the manometer sensing tube over the top
of the test port, see Figure 40 and Figure 41.
6. Open the Main Gas Shutoff Valve.
7. Measure and record the supply gas pressure, this is a "static"
supply gas pressure reading; while the water heater is not
firing. Adjust supply gas pressure as necessary, see Gas
Supply Systems on Page 16.
MANIFOLD GAS
PRESSURE
TEST PORT
(Non-Adjustable)
COMBUSTION
BLOWER
CONNECTION
GAS CONTROL VALVE / VENTURI ASSEMBLY TOP VIEW
Figure 40
SUPPLY GAS
PRESSURE
TEST PORT
GAS CONTROL
VALVE
COMBUSTION
AIR INLET
VENTURI
MANIFOLD GAS
PRESSURE
TEST PORT
(Non-Adjustable)
GAS CONTROL VALVE TOP DETAIL VIEW
GAS
VALVE
GAS CONTROL VALVE / VENTURI ASSEMBLY SIDE VIEW
44
SUPPLY GAS
PRESSURE TEST PORT
Figure 41
SUPPLY GAS
CONNECTION
COMBUSTION
AIR INLET
VENTURI
Figure 42