Weil-McLain Series 4 Manuale utente

Part Number 550-110-646/0607

This supplement must only be used by a qualiﬁed heating installer/service technician. Before installing, read all

instructions, including this supplement, the boiler manual and any related documents. Perform steps in the order given.

Failure to comply could result in severe personal injury, death or substantial property damage.

Control supplement – Universal control systems

For additional information, refer to . . .

EG • PEG • EGH Boiler manual

for Natural or Propane gas

(tankless heater application optional)

Gas-Fired Boilers – Series 4

EG•

PEG•

EGH

2Part Number 550-110-646/0607

EG • PEG • EGH Series 4

Controls must only be installed by a Weil-McLain distributor or other qualiﬁed

installer/service technician in accordance with this Supplement and all applicable

codes and requirements of the authority having jurisdiction. Read this Control

Supplement completely before beginning the installation. If the information

in this Supplement is not followed exactly, a ﬁre, explosion, carbon monoxide

emission or other hazardous conditions can result, causing severe personal injury,

death or substantial property damage.

This system is used on gas-ﬁred boilers without vent dampers as shipped from

the factory. This system is not offered for retroﬁt.Any attempt to apply the system

components to boilers shipped for use with a different control system will not

be covered under boiler warranty and can cause severe personal injury, death or

substantial property damage.

When calling or writing about the boiler, please have the boiler model number

from the boiler rating label and the CP number from the boiler jacket.

Note to the installer

The following deﬁned terms are used throughout these instructions to bring attention to the

presence of hazards of various risk levels or to important information concerning the life of

the product.

Indicates presence of hazards that will cause severe personal injury, death or

substantial property damage.

Indicates presence of hazards that can cause severe personal injury, death or

substantial property damage.

Indicates presence of hazards that will or can cause minor personal injury or

property damage.

Indicates special instructions on installation, operation or maintenance that are

important but not related to personal injury or property damage.

Hazard deﬁnitions

Please read this page ﬁrst!

Part Number 550-110-646/0607

Universal control systems — Control supplement

Hazard deﬁnitions and Note to the installer ....................................................................................2

Control installation — EG-30 through EG-75 water boilers without tankless heaters ............ 4-5

Control installation — EG-30 through EG-75 water boilers with tankless heaters .................. 6-7

Control installation — EG and PEG steam boilers with probe-type low water cutoff ............. 8-9

Control installation — EG steam boilers with ﬂoat-type low water cutoff............................ 10-11

Control installation — EGH water boilers without tankless heaters ..................................... 12-13

Control installation — EGH water boilers with tankless heaters........................................... 14-15

Control installation — EGH steam boilers with probe-type low water cut-off ..................... 16-17

Control installation — EGH steam boilers with ﬂoat-type low water cut-off ....................... 18-19

Damper installation ..........................................................................................................................20

Checkout procedure ........................................................................................................................21

Operating instructions ............................................................................................................... 22-26

Troubleshooting.......................................................................................................................... 27-31

Replacement parts ...........................................................................................................................32

Table of contents

4Part Number 550-110-646/0607

EG • PEG • EGH Series 4 — Universal control systems — Control Supplement

Part Number 550-110-646/0607

Universal control systems — Control supplement

For your safety, turn off electrical power

supply and turn off external gas supply

valve before attempting to work on the

boiler. Failure to comply can cause severe

personal injury, death or substantial prop-

erty damage.

Control installation

EG-30 through EG-75 water boilers without tankless heaters

1. Mount and wire controls per wiring diagram, page 4, and Figure 1.

a. Attach junction box inside left jacket panel with #8-32 x ½”machine screws

provided.

b. Install transformer with plug-in relay receptacle and relay.

c. Operating and limit circuit wiring must be 18 gauge or heavier.

2. Bring supply wiring to boiler. Must be 14 gauge or heavier.

3. Proceed to page 20.

Figure 1 EG-30 through EG-75 water boilers without tankless heaters

6Part Number 550-110-646/0607

EG • PEG • EGH Series 4 — Universal control systems — Control Supplement

Part Number 550-110-646/0607

Universal control systems — Control supplement

For your safety, turn off electrical power

supply and turn off external gas supply

valve before attempting to work on the

boiler. Failure to comply can cause severe

personal injury, death or substantial prop-

erty damage.

Control installation continued

EG-30 through EG-75 water boilers with tankless heaters

1. Mount and wire controls per wiring diagram, page 6, and Figure 2.

a. Install combination limit control and relay in tapping. See Boiler Manual

control tapping table. Operating and limit circuit wiring must be 14 gauge

or heavier.

2. Bring supply wiring to boiler. Must be 14 gauge or heavier.

3. Proceed to page 20.

Figure 2 EG-30 through EG-75 water boilers with tankless heaters

8Part Number 550-110-646/0607

EG • PEG • EGH Series 4 — Universal control systems — Control Supplement

Part Number 550-110-646/0607

Universal control systems — Control supplement

For your safety, turn off electrical power

supply and turn off external gas supply

valve before attempting to work on the

boiler. Failure to comply can cause severe

personal injury, death or substantial prop-

erty damage.

Control installation continued

EG and PEG steam boilers with probe-type low water cut-off

1. Mount and wire controls per wiring diagram, page 8, and Figure 3.

a. Attach junction box inside left jacket panel with #8-32 x ½”machine screws

provided.

b. Install transformer with plug-in relay receptacle and relay.

c. Operating and limit circuit wiring must be 18 gauge or heavier.

2. Bring supply wiring to boiler. Must be 14 gauge or heavier.

3. Proceed to page 20.

Figure 3 EG and PEG steam boilers with probe-type low water cut-off

10 Part Number 550-110-646/0607

EG • PEG • EGH Series 4 — Universal control systems — Control Supplement

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