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Part Number 550-110-639/0703
2
EG, PEG, EGH GAS-FIRED BOILERS — SERIES 4 — BOILER MANUAL
1
Hazard definitions
The following defined terms are used throughout this manual 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.
Installation ............................................................................................. 3
Piping Connections................................................................................ 9
Install Boiler Controls..........................................................................12
Optional Heaters ................................................................................. 13
Gas Piping ............................................................................................14
Wiring ................................................................................................... 15
Final Adjustments................................................................................ 16
Check Out Procedure .......................................................................... 18
Service ..................................................................................................19
Replacement Parts............................................................................... 22
Data ...................................................................................................... 26
Ratings ................................................................................................. 27
Contents
The boiler contains ceramic fiber and fiberglass materials. Use care when handling these materials per
instructions on page 19 of this manual. Failure to comply could result in severe personal injury.
Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system
components can result, causing substantial property damage.
Read all instructions before installing. Failure to follow all instructions in proper order 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. You may list the CP number in the space provided on
the Installation and service certificate found on page 18.
Important
EG and EGH boilers for tankless or storage heater application are available only on special order as factory-installed
optional equipment. Tankless heater cannot be added to standard block assembly. Block assembly must be ordered
with heater openings. Standard boilers cannot be adapted for heater use.