5
INDIRECT FIRED WATER TANK
IV INSTALLATION/PIPING
The Location of the heater.
Locate the heater so that there is easy access to the control,
piping, valves, drain and heater for future servicing and main-
tenance. The heater is to be kept in an area where it is not
exposed to freezing temperatures.
Also, the heater must be located in an area where a leak
(eg. from the piping or fittings, from any temperature and
relief valve discharge, or from the tank itself), will not cause
personal harm or damage the surrounding area. The tank
should be installed in an area with a floor drain or in a pan
suitable for water heaters.
Slant/Fin will not be held liable for any damages caused by
water leakage.
The floor or area where the tank is installed must be
capable of supporting the tank when filled with water.
(Refer to Table at right.)
Read the Installation and Operating Instructions manual
thoroughly. Follow recommended piping and wiring diagrams.
Upon completing installation, fill the tank with water. While
filling it leave a hot water faucet open until a steady stream of
water is flowing. Then, shut the faucet and check for any leaks
thoughout the entire system.
Model
Weight (lbs.)
HWT-40
HWT-60
HWT-80
HWT-120
449
576
737
1324
TANK WEIGHT WHEN FILLED
FOR YOUR SAFETY
: Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.
Controls on this appliance could ignite vapors causing an explosion
PIPING
1. General
a. All plumbing must be in accordance with
the requirements of the authority having
jurisdiction.
b. Use both thread tape and pipe dope on all
mechanical connections.
c. Zone valve (if used) and circulator must be
sized to provide minimum flow rate specified
in the table to the right, Flow Specifications.
Use 1 inch nominal copper tubing between
boiler and heat exchanger. See the tables on
Friction Loss. Point of emphasis: using a
zone valve without a full bore may cause
high pressure drop which will adversely
affect performance. Use extreme care when
selecting zone valve.
d. All piping must be adequately supported.
e. Allow for thermal expansion.
f. Dielectric Unions (recommended)-used to
electrically isolate the tank from the connect-
ed domestic water piping. This helps to min-
imize the possiblity of corrosion
damage.
Model No.
Recommended
Flow Rate
Heat Exch.Pressure
Drop (Ft. Hd.)
Domestic Water
Connection Sizes
HWT-40
HWT-60
HWT-80
HWT-120
10 GPM
10 GPM
14 GPM
14 GPM
2.3
2.3
11
11
3/4"
3/4"
1"
1" MPT
Tubing Type
Flow Rate (gpm)
10 gpm
15 gpm
Type K
Type L
Type M
3.1 psi
2.7 psi
2.3 psi
6.5 psi
5.7 psi
4.7 psi
Fitting
Wrought
Cast
90º Elbow
45º Elbow
Tee, Run
Tee, Branch
90º Bend
180º Bend
Gate Valve
1
1
1/2
3
2
2
-
4
2
1/2
5
-
-
1
Flow Specifications
Friction Loss 100 Feet of Tubing (psi)
Friction Loss Allowance for Copper Fittings
(feet of straight tubing
)
Notes: All fittings are female NPT thread connections
