CWH companion water heater — Product Manual
Determine required temperature rise
Determine domestic
water inlet water
temperature — TI
T1 is the groundwater temperature typical
for the boiler location.
Determine required
domestic water outlet
temperature — TO
This is the required temperature exiting
the mixing valve.
Determine required
domestic water
temperature rise — TR
The required temperature rise is the differ-
ence between TO and TI. Use the closest
value in the Ratings table, next page.
Example — a home in
Philadelphia requires
115°F domestic water.
What is the required
temperature rise?
1. The groundwater temperature for the
Philadelphia area is 47°F.
TI = 47°F
2. The required domestic water outlet
temperature is 115°F.
TO = 115°F
3. The required temperature rise is the
difference:
TR = 115 – 47 = 68°F
4. Use the 70°F temperature rise capac-
ity chart on the next page to select the
required water heater/boiler combina-
tion.
TR = TO – TI
Part number 635-500-156/0113
40
To Next Page
Loading...
