750-136
Model WB Electric Boiler Manual
2-3
2.5 — Electrical
FIGURE 2-1. Typical Piping Arrangement for Bypass System
For optimum temperature control without cycling, the flow rate through the boiler must be kept constant.
2.5 — Electrical
The following procedures are based on requirements of the National Electrical Code. Local electrical codes and/or
boiler codes may require slightly different procedures, and it is therefore recommended that the electrical instal-
lation be performed under the supervision of a qualified and licensed electrical contractor familiar with local
codes and inspection procedures.
Electric hot water boilers are typically designed for top connection to the main supply lugs and are supplied with
solderless wire connectors suitable for copper supply wires.
Disconnect and lock out the main power before proceeding with the electrical installation in order to avoid the hazard
of electrical shock, which can cause serious personal injury or death.
* If the hot water boiler cannot handle the full system GPM, substitute the balancing valve, which will be partially
opened, to bypass the appropriate portion of flow. The flow must be constant.
** The boiler temperature control is to be located so as to sense temperature of the system water after the boiler
water and bypassed water have blended (TI3).
!
Warning
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