User Guide

6
Design Guide - HZH/HZV Series
iGate
®
Information gateway to monitor,
control and diagnose your system
HZ Series is equipped with industry-rst, iGate
®
–
Information Gateway – 2-way communicating system
that allows users to interact with their geothermal system
in plain English AND delivers improved reliability and
efciency by precisely controlling smart variable speed
components. iGate
®
makes Tranquility
®
Digital series the
easiest geothermal products to install and service.
Monitor/Congure – Installers can congure HZ
units from the iGate
®
communicating thermostat or
conguration/diagnostic tool, including: Air ow, loop,
water-ow option conguration, unit conguration,
accessory conguration, and demand reduction (optional,
to limit unit operation during peak times). Users can look
up the current system status: temperature sensor readings
and operational status of the blower and pump.
Precise Control – The new DXM2 board enables
intelligent, 2-way communication between the DXM2
board and smart components like the communicating
thermostat, fan motor, and water pump. The DXM2
control can also directly control the modulating valve and
accepts various feedback/input (see gure). The Intelligent
DXM2 board uses information received from the smart
components and sensors to precisely control operation
of variable speed fan, variable speed water pump (or
modulating valve) to deliver higher efciency, reliability
and increased comfort.
Diagnostics – iGate
®
takes diagnosing geothermal units
to a next level of simplicity, by providing a dashboard of
system and fault information, in plain English, on the iGate
thermostat/ service tool.
iGate
®
Service Warning warns the occupant of a fault and
displays fault description, possible causes and current
system status (temperature readings, fan RPM and water
ow status) which may be reported to service personnel.
In iGate
®
Service Mode, the service personnel can access
fault description, possible causes and most importantly,
the conditions (temp, ow, i/o conditions, conguration)
at the time of the fault. Manual Operation mode allows
the service personnel to manually command operation for
any of the thermostat outputs, blower speed, as well as
pump speed or valve position from the thermostat, to help
troubleshoot specic components.
With iGate
®
communicating system, users and contractors
have a gateway to system information never before
available.
AIRFLOW SELECTION
CFM
HEAT STAGE 1 600
HEAT STAGE 2 750
AUXILIARY HEAT 850
EMERGENCY HEAT 850
COOL STAGE 1 525
COOL STAGE 2 700
COOL DEHUMID 1 425
COOL DEHUMID 2 550
CONTINUOUS FAN 350
HEAT OFF DELAY 60
COOL OFF DELAY 30
PREVIOUS NEXT
POSSIBLE FAULT CAUSES
LOW WATER COIL TEMP
LOW WATER TEMP - HTG
LOW WATER FLOW - HTG
LOW REFRIG CHARGE - HTG
INCORRECT LT1 SETTING
BAD LT1 THERMISTOR
PREVIOUS
FAULT TEMPERATURE CONDITIONS
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
LT1 TEMP 28.1
LT2 TEMP 97.3
HOT WATER EWT 121.5
COMP DISCHARGE 157.7
LEAVING AIR 92.7
LEAVING WATER 34.9
ENTERING WATER 42.1
CONTROL VOLTAGE 26.4
PREVIOUS
iGate
®
Communicating Controls
Communicating
Thermostat
7602-457
7602-444
Mot.
Modulating
Valve
Fan
Variable
Speed
Pump
Two-Way Communication
One-Way Communication
Sensors
Diagnostic
Tool
Or
Or