Loading ...
Loading ...
Loading ...
Part Number 550-142-303/1120
21
EG
/
PEG sEriEs 6
•
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.
Figure 24 Tankless heater piping EG (water boiler)
Connect piping – tankless heater (optional)
Table 10 Minimum recommended pipe sizes
Piping connections not furnished. Use brass plugs
in tees and crosses to facilitate cleaning in hard
water areas.
Figure 25 Tankless heater piping EG/EGH (steam boiler)
Boiler
Model
Heating
Number
(Note 3)
Intermittent
Draw GPM
100°F Av.
Temp. Rise
(Note 1)
Continuous
Draw GPM
100°F Av.
Temp. Rise
(Note 2)
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”
Notes:
Weil-McLain ratings based on 60 PSIG domestic water pressure
at heater.
1. Gallons of water per minute heated from 40°F to 140°F with
200°F boiler water temperature.
2. Continuous draw – no recovery period.
3. These single wall heat exchangers comply with National
Standard Plumbing Code provided that:
• Boiler water (including additives is practically non toxic,
having a toxicity range or class of 1, as listed in Clinical
Toxicology of Commercial Products, and
• Boiler water pressure is limited to max. 30 PSIG by
approved water or steam relief valve.
Studies have indicated that dangerous bacteria can form
in potable water distribution system if certain minimum
water temperatures are not maintained. Contact local
health department for more information.
These single wall heat exchangers comply with National
Standard Plumbing Code provided that:
• Boilerwater(includingadditives)ispracticallynon-
toxic, having a toxicity rating or class of 1, as listed in
Clinical Toxicology of Commercial Products.
• Boilerwaterpressureislimitedtomaximum30psig
by approved water relief valve.
See Automatic mixing valve and Scaud warnings, page 27.
NSF/ANSI 372
Tankless water heaters for EG / EGH
boilers have been tested and certied by
CSA Group (certicate # 2552127).
Loading ...
Loading ...
Loading ...