Install Instructions

Part Number 550-142-782/1112
21
EG
&
PEG SERIES 5
s
EGH SERIES 5 GAS-FIRED BOILERS — BOILER MANUAL
EG and EGH boilers for tankless heater applica-
tion are available only on special order as factory-
installed optional equipment. Standard boilers
cannot be adapted for heater use. Install a tankless
heater only in a steam boiler or forced hot water.
For correct operation, install as shown in Figure 24 (water boilers)
or Figure 25 (steam boilers).
1. Automatic mixing valve must be installed per mixing valve
manufacturer’s instructions.
2. Flow regulating valve must be installed. Size according to
intermittent draw of heater as shown in following table.
3. Operating control with a small differential scale is recom-
mended. Install in temperature control tapping in heater
plate.
4. In hard water areas, it is advisable to soften cold domestic
supply water to the tankless heater to prevent lime buildup.
&IGURE Tankless heater piping EG (water boiler)
Connect piping – tankless heater (optional)
4ABLE Minimum recommended pipe sizes
Piping Connections not furnished. Use
brass plugs in tees and crosses to facilitate
cleaning in hard water areas.
&IGURE Tankless heater piping EG/PEG/EGH (steam boiler)
Boiler Model
Heating
Number

Intermittent
Draw GPM
100°F Av.
Temp. Rise

Continuous
Draw GPM
100°F Av.
Temp. Rise

Inlet and
Outlet
Tappings
Temp.
Control
Tapping
Water
EG-35 E-624 3.00 1.60
½” ¾”
EG-40 E-624 3.00 2.00
½” ¾”
EG-45 E-624 3.25 2.40
½” ¾”
EG-50 E-626 4.00 2.80
½” ¾”
EG-55 E-626 4.25 3.20
½” ¾”
EG-65 E-632 4.50 4.00
½” ¾”
EG-75 E-632 4.50 4.80
½” ¾”
Steam
EG/PEG-35
35-S-29
3.00 1.60
¾” ¾”
EG/PEG-40
35-S-29
3.00 2.00
¾” ¾”
EG/PEG-45
35-S-29
3.25 2.40
¾” ¾”
EG/PEG-50
35-S-29
3.25 2.80
¾” ¾”
EG/PEG-55
35-S-29
3.50 3.20
¾” ¾”
EG/PEG-65
35-S-29
3.75 4.00
¾” ¾”
EG-75
35-S-29 4.00
4.80
¾” ¾”
EGH-85
35-S-29
4.00 5.00
¾” ¾”
EGH-95
35-S-29
4.00 5.00
¾” ¾”
EGH-105
35-S-29
4.00 5.00
¾” ¾”
EGH-115
35-S-29
4.00 5.00
¾” ¾”
EGH-125
35-S-29
4.00 5.00
¾” ¾”

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sure at heater.
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Standard Plumbing Code provided that:

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