heat-timer ETV Platinum Plus, Инструкция по установке и эксплуатации

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4 ETV Platinum Plus Installation and Operation Manual
059305-00 Rev. D Heat-Timer Corp.
Detailed Operation
Overview
The ETV Platinum Plus (Electronic Tempering Valve) is a hot water temperature control capable of operating one
or more electronic motorized mixing valves to regulate the system water temperature. The electronic mixing
valves are controlled using any of its voltages or current output modulation signals. Its modulation PID is
designed to respond quickly, which makes it suitable for domestic hot water applications.
The ETV Platinum Plus consists of four primary components:
• the ETV Platinum Plus control
• the electronic motorized Actuator
• the 3-way mixing valve
• an immersion temperature sensor
If applicable f or added protection, the ETV Platinum contains a power loss capacitor which will close the
hot water supply to the mixing valve on a loss of power. The ETV Platinum Plus control can also be
configured to close the hot water supply to the mixing valve if the mixed outlet temperature exceeds the
Alarm Limit. It does that by operating a TMC Safety Valve mounted on the hot water supply.
ETV Operating Concept
The ETV Platinum Plus control modulates the electronic motorized mixing valve to maintain a
temperature setpoint. It does that by mixing two different water temperatures from two different
sources; a hot water source and a cold-water source. The hot water source can be a hot water boiler,
a hot water coil in a steam boiler, or a hot water storage tank. The cold water comes from the city
water system.
The cold water inlet is joined with the circulating loop return pipe to help maintain flow in the valve during
periods of no usage. The ETV Platinum Plus operation requires the use of a circulating loop pump to
maintain the loop temperature.
To save on energy, the ETV Platinum Plus provides a 7-day schedule to help reduce the
water temperature during periods of low usage.
TMC Operating Concept
In addition to maintaining the mixed output setpoint, the ETV Platinum Plus helps protect the system from
excessive water temperatures. It does that by closing a TMC Safety Valve feeding the mixing valve's hot water.
When the mixed outlet exceeds the alarming temperature setpoint (see “TMC Setpoint” on page
45 ) for the delayed period (see “TMC Trigger Delay” on page 45 ), the control closes the TMC valve blocking all
hot water flow to the mixing valve and triggers an alarm.
ETV + TMC Operating Concept
The ETV + TMC mode combines both the ETV and TMC modes. In this mode, the ETV Platinum Plus controls
the valve to maintain temperature, and monitors the outlet temperature to ensure the specified temperature
is not exceeded.