Installation instructions
3.8Measuring gas pressure
Confirm proper gas pressure upon installation.
Connecting Manometer
BShut off gas supply at installer supplied shutoff valve.
BRemove front cover and locate inlet gas pressure measuring point (see Fig. 24).
B Loosen screw inside left test point fitting (do not remove) and connect manometer tube to test point. Remove screw completely if correct size adapter is available.
Static Pressure Test
BTurn gas supply back on.
BOperate all other gas appliances (except heater) on same gas piping system at maximum output.
BRecord static gas pressure reading in table 7.
Operating Pressure Test
BON/OFF switch in position OFF (0).
BPress and hold "Program" (P) button and turn ON/ OFF switch to ON position.
Fig. 23
B As soon as '188' is displayed, release "Program"
, button and the display should read P2.
BPress 
until P1 appears.
Note: While in this mode the appliance will run constantly at maximum power and allow maximum water flow.
BTurn on a high volume of hot water (at least 4 gpm) and heater will ignite. If heater display reverts to P2, open more hot water fixtures to allow sufficient flow.
Press 
until P1 reappears on display.
B Record lowest operating gas pressure reading in table 7.
Gas pressures lower than 5" W.C. for Natural Gas or 11" W.C. for LPG will result in insufficient degree rise to the hot water being used, possible error code faults and must be corrected. See Gas Connections, chapter 3.7.
Fig. 24 Gas pressure measuring (left tapping)
Static Gas Pressure Reading (see Chapter 3.8)
enter here: ___________________ Date: ___________
Operating Gas Pressure Reading (see Chapter 3.8)
enter here: ___________________ Date: ___________
Table 7
HIGH ALTITUDE OPERATION
Altitude | Natural | Liquid |
|
|
| Gas: | Propane: |
|
|
|
|
|
|
|
|
|
|
| For operation at |
0 - 4,000 ft | no | no |
| elevations |
(0 - 1,219 m) | modification | modification |
| above 2,000 ft |
|
|
|
| (610 m) the |
|
|
|
| equipment |
|
|
|
| ratings shall be |
| CO2 adjustment with flue |
| reduced at the | |
4,000 ft - 7,000 ft |
| rate of 4% for | ||
(1,219 m - 2,134 m) | gas analyzer required See |
| each 1,000 ft | |
section 5.4 for instructions. |
| |||
|
| (305 m) above | ||
|
|
|
| sea level |
Above 7,000 ft |
| Not approved |
| |
(above 2,134 m) |
|
| ||
|
|
|
| |
|
|
|
|
|
Table 8
6 720 608 263 | 21 |