Tank
u
S
t
f
o
S
.
p
u
S
d
r
a
H
.
p
u
S
d
e
M
/
t
f
o
S
p
m
e
T
n
r
u
t
e
R
p. Med
Sup. Hard
Sup
d
e
M
/
t
f
o
S
.
(°F)
Temp
1
(°F)
Temp
1
(°F)
<80' equiv.
80-200' equiv. Temp
1
(°F)
Temp
1
(°F)
Temp
1
(°F)
<80' equiv. 80-200' equiv. Sup. Temp
1
(°F) <80' equiv. 80-200' equiv.
60
138
135
2"
2 1/2"
150
145
143
2"
2 1/2"
154
2"
2 1/2"
80
138
135
2"
2 1/2"
150
145
143
2"
2 1/2"
154
2 1/2"
3"
100
138
135
2 1/2"
3"
150
145
143
2 1/2"
3"
154
2 1/2"
3"
120
146
146
2 1/2"
3"
150
146
146
2 1/2"
3"
155
2 1/2"
3"
130
156
156
2 1/2"
3"
156
156
156
2 1/2"
3"
165
2 1/2"
3"
140
166
166
2 1/2"
3"
166
166
166
2 1/2"
3"
175
2 1/2"
3"
1
-Approximate high fire heater outlet temperature based on the specified heater pump and the recommended minimum tubing size.
2
-Minimum tubing size based on total equivalent feet of supply and return piping between the tank and heater.
Model 1005
Minimum Tubing Size
2
Minimum Tubing Size
2
Minimum Tubing Size
2
5
0
0
2
l
e
d
o
M
5
0
5
1
l
e
d
o
M
Table H: Hot Water Supply Temperatures and Minimum Pipe Size at Varying Return Temperatures
Winterizing Your Heater
Heaters installed outdoors as pool heaters in freezing
climate areas should be shut down for the winter. To
shut down the heater, turn off manual main gas valve
and main gas shut-off. Close isolation valves. Drain
the heater using the hose bibs located on the bottom
of both heat exchangers. Disconnect the condensate
hose from the secondary heat exchanger and drain
the condensate trap.
Pool/Spa Water Chemistry
NOTE:
There are 3 separate drains on the XTherm
that must ALL be drained to protect the heat
exchanger. These are accessible by removing the
lower front door from the heater for the 2 primary
drains and the right-rear panel for the secondary
drain. Drain any piping of all water that may
experience below-freezing temperatures.
Chemical imbalance can cause severe damage to the
pool heater and associated equipment. Maintain the
water chemistry according to the chart below. If the
mineral content and dissolved solids in the water
become too high, scale forms inside the heat exchang-
er tubes, reducing heater efficiency and damaging the
heater. If the pH drops below 7.2, this will cause corro-
sion of the heat exchanger and severely damage the
heater. Heat exchanger damage resulting from chem-
ical imbalance is not covered by the warranty.
For your health and the protection of your pool equip-
ment, it is essential that your water be chemically
balanced. The following levels must be used as a
guide for balanced water.
Occasional chemical shock dosing of the pool or spa
should not damage the heater providing the water is
balanced.
NOTE:
Chemical imbalance can cause severe
damage to your heater and associated equipment.
Recommended Level(s)
Fiberglass Pools
Fiberglass Spas
Other Pool and Spa
Types
Water Temperature
68-88°F (20-31°C)
89-104°F (31-40°C)
68-104°F (20-40°C)
pH
7.3-7.4
7.3-7.4
7.6-7.8
Total Alkalinity (ppm)
120-150
120-150
80-120
Calcium Hardness (ppm)
200-300
150-200
200-400
Salt (ppm)
140 Maximum**
140 Maximum**
140 Maximum**
Free Chlorine (ppm)*
2-3
2-3
2-3
Total Dissolved Solids
(ppm)
3000 Maximum
3000 Maximum
3000 Maximum
*Free Chlorine
MUST NOT EXCEED 5 ppm!
**Not for use with salt water pools.
Table I: Water Chemistry
CAUTION:
Corrosive water voids all warranties.
California Hot Water Supply, Inc.
(800) 249-7244
18
