Installation
Gas pipework installation
The installation must conform to all standards and regulations.
The gas supply pipework and gas stop valve to be installed near the unit must be sized so as to assure the gas pressure is sufficient at the unit inlet when operating at full load.
CAUTION! Should the pressure at the unit valve gas inlet be higher than 0.035 bar, an expansion valve must be installed.
The pipework must be self- supporting and the final connection to the burner must be made by a flexible pipe. Provide a dust protection (filter) upstream the unit connection.
CAUTION! The gas pipework must not exert any stress on the burner gas connection.
Note: Expansion valve must be adapted to the type of gas used:
•G 20 : 20 mb
•G 25 : 25 mb
•G 31 : (Propane): 37 or 50 mb
Table 4 - Gas burner models
Unit | Burner size |
YKD/H 155 G350A
YKD/H 175 G350A
YKD/H 200 G350A
YKD/H 250 G350A
| See Table 38 for burner |
| performance. |
| Gas leak check procedure |
| 1. Vent the gas line |
| 2. Gas supply line pressure test: |
Figure 8 - Typical gas supply Pipework | close valve 4 and open valve 2 |
| 3. |
| Look for gas pipe leaks using |
| "Typol", "1000 bulles" or a similar |
| product. Do not use soapy water. |
| WARNING! Never use an open |
| flame to check for gas leaks. |
| Required gas pressure at the unit |
| inlet connection are given in |
| Table 37. |
| Note: To operate with propane gas, |
| the burner is fitted with a pressure |
| limiter (supplied by Trane) |
1 | = Evaporator section | 5 | = Gas supply line |
2 | = Gas burner section | 6,8 = Gas stop valve (Field supplied) | |
3 | = Condenser section | 7 | = Expansion valve (Field supplied) |
4 | = Gas supply connection | 9 | = Filter (Field supplied) |
13 |