Slant/Fin WH-30, WH-30 D, WH-40, WH-60, WH-80 Installation And Operating Instructions Manual

Indirect-Fired Storage Water Heater

Models WH-30 through WH-80

INSTALLATION AND OPERATING INSTRUCTIONS

Contents Page

Ratings and Specifications . . . . . . . . . . . . . . . . . . . . . 2

Installation Requirements . . . . . . . . . . . . . . . . . . . . . . 3

Piping Requirements . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 7

Maintenance Recommendations . . . . . . . . . . . . . . . . . 7

Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . 7

Lifetime Limited Warranty . . . . . . . . . . . . . . . . . . . . . . 8

WARNING - HOT WATER CAN SCALD!

Read all of the following important warnings to avoid
the possibility of personal injury, death, or property
damage.

Heater Package includes:

• Fully insulated stainless steel tank with temperature
control well installed.

• Temperature control adjustable from 120°F to 160°F.

• Temperature and pressure relief valve.

• Plumbing hardware for installing T&P valve.

• Keep temperature control on heater at lowest
setting which is satisfactory.

• Always adjust water temperature from taps by start­ing with a cool mix of water and gradually bring to
warmer temperature.

• Never leave children, elderly or disadvantaged per­sons unattended where hot w

WARNING TO THE USER:

ater taps are located.

THE INST

O

ARNING

W

eep temperature control on heater at lowest setting

K

•
which is satisf
Installation of a temper

•
of the proper rating for the heater tank size is
required.
Install a tempering device

•
hot water piping which feeds areas where high
temperature water is not demanded.
When ser

•
nections are tight and drain hose is directed away
from all persons or areas where injury or damage can
occur

vicing this installation, mak

.

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SERVICEPERSONS:

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ature and pressure relief v

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Indirect-Fired Storage Water Heater

Models WH-30 through WH-80

RATINGS & SPECIFICATIONS

Ratings

First Hour Ratings (gph) Heat Exchanger Coil

Storage Heating

Model Capacity at 140° F at 115° F Surface Recommended Pressure

No. (gal) (90°F

∆∆

T) (65°F

∆∆

T) (Sq.Ft) Flow Rate Drop

WH-30 30 156 215 15 6 gpm 4.6 ft
WH-40 40 195 288 15 6 gpm 4.6 ft
WH-60 60 254 348 15 7 gpm 6.8 ft
WH-80 80 300 400 34 10 gpm 12.0 ft

Double wall coil models

WH-40 D

40 110 152 20 6 gpm 8.0 ft
WH-60 D 60 126 174 20 6 gpm 8.0 ft
WH-80 D 80 160 221 20 6 gpm 8.0 ft

Dimensions

Floor to

Boiler

Domestic

Temp.

Cont. Ship

Connections N.P.T

Model In Out In Out Well Domestic Boiler Weight

No. Height Diameter C B A E D In/Out In/Out (lb.)

WH-30 39
WH-40 52
WH-60 52

1

/2"19

1

" 19

/2

1

/2" 231/4"9"4

WH-80 72" 24" 29" 6" 6" 66" 33" 1

1

/4"9"4

1

"9"4

/4

1

/2" 3" 34" 171/2"

1

/2

1

/2" 3" 46" 233/4" 1" 1" 98

" 3" 46" 23

3

3

"

/4

/4" 1" 67

3

" 1" 78

/4

1

/2" 1" 139

Double wall coil models

WH-40 D 52
WH-60 D 52

1

/2" 191/4"9"4

1

"

/2

23

1

/4

9" 4

"

WH-80 D 72" 24" 29" 6" 6" 66" 33" 1

1

/2" 3" 46" 233/4"

1

3" 46" 23

"

/2

3

3

"

/4

/4" 1" male 88

1" 1" male 108

1

/2" 1" male 149

Tank working pressure: 150 psi

.

2

INSTALLATION REQUIREMENTS

The installation of this indirect-fired storage water heater must
conform to the following:

. Local, state, provincial, and national codes, laws, regulations

1

nd ordinances.

a

. National Electrical Code (NEC).

2

3. National Plumbing Code (NPC).

4. Building Officials and Code Administrators International
(BOCA).

In any case where instructions in this manual conflict with the
above, let those codes take precedence.

he location of this indirect-fired storage water heater should be

T

ade in consideration of the following:

m

. Install indoors where not subjected to freezing temperatures or

1

physical damage.

2. Install as close to boiler as practical, to minimize piping con­nections pressure drop and heat loss.

3. For system service convenience, do not install too close to the
boiler or other objects.

4. Install near a floor drain if possible, to prevent possible proper­ty damage due to relief valve discharge or equipment leakage.
A drain pan is most suitable for protecting the surrounding
area.

The boiler used to supply hot water to the heater must meet these
requirements:

1. In some jurisdictions the boiler’s operating pressure must be
limited to 30 psig by a safety relief valve.

2. The boiler’s input rating must be within the heater’s recom­mended sizing guide specifications. Too low an input rating
may cause excessive condensation in the boiler. Too high an
input rating may cause a boiler short cycling condition. Either
of these conditions could be detrimental to the life and perfor­mance of the system.

BOILER PIPING CONNECTIONS

. General piping recommendations (See Fig. 4)

1

) Install unions and shutoff valves for servicing conve-

a

ience.

n

b) Use 1” nominal minimum piping size and keep number

of elbows and overall piping length to a minimum to
insure the proper water flow rate to the heater coil.

c) Pipe the supply from the boiler into the coil inlet con-

nection, located at the top of the coil.

d) Pipe the return to the boiler from the coil outlet con-

ection, located at the bottom of the coil. Install a tee

n

ith a drain at the coil connection, with a shutoff valve,

w

o aid in manual air purging.

t

2. Circulator zoning recommendations (See Fig. 2)
a) The preferred location of the circulator pumps for each

zone is on the boiler supply, with the expansion tank
between the boiler and the circulators.

b) A flow check valve must be installed on each zone,

preferably at the outlet side of each circulator pump, to
prevent water flow to other zones when they are not
demanding flow.

3. Zone valve zoning recommendations (See Fig. 3)
a) The preferred location of the circulator pump is on the

boiler supply, with the expansion tank between the
boiler and the circulator.

b) Use zone valves with low pressure drop specifications,

particularly on the water heater zone. A 1” zone valve
is recommended.

Figure 2. Typical piping for circulator zoning

PIPING REQUIREMENTS

TEMPERATURE AND PRESSURE RELIEF VALVE

1. Use only the Watts model or equivalent specified in the chart
below. The rating of each valve meets the absorption capaci­ty of only the model of heater for which it is specified.

2. Must be installed in the run of a tee located in domestic hot
water outlet in heater, unless a dedicated installation port is
provided. No shutoff valves are permitted to be piped between
the relief valve and the heater tank, nor on the T & P discharge
line. (See Fig. 4)

3. Must be positioned to discharge downward, with the dis-

Figure 3.

ypical piping for zone valve zoning

T

charge line within 6” of the floor line and directed towards a
drain or drain pan, if possible. The discharge line must not be
excessively long or reduced in size, be subject to freezing, or
be directly connected to a drain.

Temperature and pressure relief valve specifications

Heater Model T & P valve location T & P valve installs into: Watts Model or Equivalent*

ater outlet

WH-30
WH-40
WH-60
WH-80

*

T & P valve must have 8” long temperature probe.

†

Also applies to double wall coil models WH-40 D, WH-60 D and WH-80 D.

†

†

†

hot w

ater outlet

hot w
hot water outlet 1” NPT Tee with bushing 100 XL-8

dedicated por

t

3

/4”

3

NPT

”

/4

3

NPT

”

/4

Male x F

ee

T

ee 100 XL-8

T

emale nipple

100 XL-8

40 XL-8

3

Male inlet

”

/4

3

Male inlet

”

/4

3

/4” Male inlet

3

Male inlet

/4”

3