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Introduction
1
1.0 INTRODUCTION
The Envirosource Module is an accessory to the Process Chiller, for use on systems that circulate
water and/or glycol solutions that require an isolated loop from the emergency water source. With the
heat exchanger providing fluid separation, the Envirosource automatically switches to the emergency
water source on a high fluid temperature alarm. Additionally, the module automatically switches to
standby pump operation (with interlock to shut down the Process Chiller pump) on a loss of flow
alarm.
The Envirosource Module is available in 208/230/460V, single-phase and three-phase, 60 Hz configu-
rations. This module is a pre-piped and wired assembly that is encased in an almond colored, powder
coated and baked cabinet. It consists of a copper brazed stainless steel heat exchanger, stainless steel
pump, copper piping, RCM4 alarm monitor, adjustable time delay relays, high temperature thermo-
stat, cooling solenoid valve, check valve and flow switch. It also includes a manual ball valve and dou-
ble-check back-flow preventer on the city water line.
The integral RCM4 alarm monitor has a local display of normal operation, standby pump and standby
cooling, “on” LED. Terminal strips are included for two optional alarms (customer supplied dry con-
tacts) and for common alarm output (dry contacts, NC/NO/COM).
The Process Chiller is modified with a bypass line to permit water to flow around the chiller’s pump
when the standby pump in the Envirosource Module is operating. This bypass line runs from the
pump suction line to the pump discharge line and includes a ball valve and check valve (see
Figures 1 and 2).
Table 1 Model numbers for minimum application flow
Model # Range (gpm)
ENV05G-_00 0.3 - 1.1
ENV10G-_00 3.7 - 13.3
ENV20G-_00 3.7 - 13.3