Laars pennant PNCH Installation And Operation Instructions Manual page 18

Page 18
certified for outdoor installations, such installations
are not recommended in areas subject to freezing
temperatures, unless proper precautions are taken.
Power outage, interruption of gas supply, failure
of system components, activation of safety devices,
etc., may prevent a heater from firing. Any time a
heater is subjected to freezing conditions, and the
GPM Water Flow
Size
Soft Normal
500 45 68
45 68
750
1000 45 68
1250 68 68
68 68
1500
1750 68 68
2000 112 112
Notes:
Soft Water = 1 to 7.5 grains hardness
Normal Water = 7.6 to 17 grains hardness
Figure 6. Suggested Piping — One Water Heater, One Tank.
Temperature Rise °F
Hard Soft Normal
90 19 13
90 28 19
90 38 25
90 31 31
90 38 38
90 44 44
112 30 30
Table 9. Temperature Rise — Water Heater.
heater is not able to fire, and/or the water is not
able to circulate, there is a risk of freezing in the
heater or in the pipes in the system. When water
freezes, it expands. This can result in bursting of pipes
in the system, or damage to the heater, which could
result in leaking or flooding conditions.
Contact the local factory representative or Laars
for additional information.
LPM Water Flow
Hard
Soft Normal
9 170 257
14
170 257
19 170 257
24 257 257
28
257 257
33 257 257
30 424 424
Hard Water = more than 17 grains hardness
GPM = gallons per minute
LPM = liters per minute
LAARS Heating Systems
Temperature Rise °C
Hard Soft Normal
341 10 7
341 16 10
341 21 14
341 17 17
341 21 21
341 24 24
424 17 17
Hard
5
8
10
13
16
18
17