Gas Pipe Sizing; Sediment Trap/Drip Leg; Testing Gas Leaks And Gas Pressure - Waterco Turbotemp 200HD Installation And Operation Manual

GAS PIPE SIZING

Heater Size
200
300
400

SEDIMENT TRAP/DRIP LEG

Install a sediment trap/drip leg and
union located outside the heater panels
in accordance with
requirements. Do not use a restrictive gas
cock. The sediment trap/drip leg shall be
either a tee fitting with a capped nipple in
the bottom outlet which can be removed
for cleaning, as illustrated in Figure 6, or
an other device recognized as an effective
sediment trap/drip leg. All gas piping should
be tested after installation in accordance
with local codes.

TESTING GAS LEAKS AND GAS PRESSURE

Before operating the heater, the heater and its gas connections must be leak tested. Do NOT
use an open flame to test for leaks. Test all gas connections for leaks with soapy water.
The gas valve must be completely disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of 6.0 kPa (.87 psig).
TESTING THE GAS PRESSURE THROUGH THE COMBINATION GAS CONTROL VALVE
!
WARNING
Risk of fire and explosion. Alteration, service, or maintenance of the Combination Gas
Control Valve can lead to fire or explosion, causing loss of life, personal injury, and/or
property damage. DO NOT ATTEMPT TO ADJUST THE GAS CONTROL VALVE.
These instructions are for the use of qualified service technicians only!
1. Shut off the gas supply to the heater.
2. Loosen the small screw inside the pressure tap as shown in Figure 7.
3. Connect the manometer hose.
4. Open the gas supply to the heater.
5. Turn on the heater.
6. Take the gas pressure reading.
7. Turn off the heater.
Distance from the Meter
0 to 15 m 16 to 30 m
25 mm 32 mm
32 mm 32 mm
32 mm 40 mm
National code
Table 2.
31 to 60 m
32 mm
40 mm
50 mm
Figure 6.