Lochinvar CP-M Series User Manual

81
16.8 SETTING A REPLACEMENT GAS VALVE
When a replacement gas valve is fitted, the following procedure must be carried out in the order stated when the
boiler is switched on for the first time. Failure to follow the following procedure may lead to non-warrantable
damage to the boiler.
Boiler
Type
Number of Turns Open
(Counterclockwise)
Nat. Gas G20
Propane G31
CP-M+60
1
0.5
CP-M+80
1.5
0.75
CP-M+100
3.5
1.5
CP-M+120
*2.25
*1
CP-M+150
*2.25
*1
CP-M+180
*4.25
*2.25
* Both gas valves must be opened this number of turns
TABLE 16.1 PRE-ADJUSTMENT OF GAS VALVES
Boiler
Type
“p-out” Pressure at Gas Valve
Nat. Gas G20
Propane G31
CP-M+120
-2 to 0 Pa
-4 to -2 Pa
CP-M+150
-2 to 0 Pa
-7 to -5 Pa
CP-M+180
-2 to 0 Pa
-7 to -5 Pa
TABLE 16.2 PRESSURE ADJUSTMENT OF LEFT GAS VALVE
boiler type
load
G20
1
G31
1
CO
2
(%)
O
2
(%)
CO
2
(%)
O
2
(%)
CP-M+60-120
2
max. load
9.0 (± 0.3)
4.8 (± 0.5)
10.3 (± 0.3)
5.2 (± 0.5)
min. load
8.7 (± 0.3)
5.3 (± 0.5)
9.3 (± 0.3)
6.7 (± 0.5)
CP-M+ 150
2
max. load
9.0 (± 0.3)
4.8 (± 0.5)
10.4 (± 0.3)
5.0 (± 0.5)
min. load
8.7 (± 0.3)
5.3 (± 0.5)
9.3 (± 0.3)
6.7 (± 0.5)
CP-M+ 180
2
max. load
9.0 (± 0.3)
4.8 (± 0.5)
10.5 (± 0.3)
4.7 (± 0.5)
min. load
8.7 (± 0.3)
5.3 (± 0.5)
9.3 (± 0.3)
6.7 (± 0.5)
1
Cf. EN437
2
All values are measured without boiler door.
TABLE 16.3 COMBUSTION GAS READINGS
FIGURE 16.1 GAS VALVES
1. Turn screw 2 (Figure 16.1) clockwise until fully closed. On models with two gas valves, this should be
done to both valves.
2. Turn screw 2 counter clockwise in accordance with Table 16.1. On models with two gas valves, this
should be done to both valves.
3. On models CP-M+120, CP-M+150 & CP-M+180, remove the screw from the outlet pressure test point of
the left hand gas valve (identified as screw 4 in Figure 16.1) and attach a manometer.
3
1
2
3
1
2
3
1
2
2
1
3
CP-M+60
CP-M+80 & 100
CP-M+120
CP-M+150 & 180
1
4
1
4

Lochinvar CP-M Series Specifications

General

Brand	Lochinvar
Model	CP-M Series
Category	Boiler
Language	English