18
Tank
u
S
t
f
o
S
.
p
uS
d
ra
H
.
p
uS
d
e
M
/t
f
o
S
p
m
e
T
n
r
u
t
eR p.MedSup.Hard Sup de
M/tf
o
S.
(°F) Temp1(°F) Temp1(°F) <80' equiv. 80-200'equiv. Temp1(°F) Temp1(°F) Temp1(°F) <80' equiv. 80-200'equiv. Sup.Temp1(°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 highfire heater outlet temperature based on the specified heater pump and the recommended minimumtubing size.
2-Minimum tubin
g
size basedon totale
q
uivalentfeetof su
pp
l
y
and return
p
i
p
in
g
between the tankand heater.
Model1005
MinimumTub in
g
Size2MinimumTub in
g
Size2Minimum Tubin
g
Size2
5
0
0
2
l
e
d
o
M
5
0
5
1
l
e
d
o
M
TableH: 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: Thereare 3 separate drains on the XTherm
that must ALL be drained to protect the heat
exchangers. 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
becometoo 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
TotalAlkalinity (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
TotalDissolved Solids
(ppm) 3000 Maximum 3000 Maximum 3000 Maximum
*FreeChlorine MUST NOT EXCEED 5 ppm!
**Notfor use with salt water pools.
TableI: Water Chemistry
CAUTION: Corrosive water voids all warranties.