Chapter 2 – Installation
Page 2-2
TestEquity 1016H & 1027H Temperature/Humidity Chamber
Input Power Configuration
Overview
This chamber can be easily configured for operation from a 208 V / 60 Hz or 230 V / 60 Hz,
3 Phase nominal input. Other input voltages and 50 Hz operation are available as special options,
and are not covered in these instructions.
Your chamber was configured prior to shipment for the voltage that was specified at time of
order. These instructions should be used to verify the input voltage configuration prior to
installation, or to change the input voltage from one configuration to another.
!
CAUTION:
This chamber must be properly configured for either 208 V or 230 V nominal
input. 208 V and 230 V are NOT the same. Do NOT guess! Do NOT assume
you have “220 V”. You must verify the exact type of electrical service you
have. If there is any doubt, you must consult with a qualified electrician who
is familiar with industrial plant wiring. In addition, the input line voltage
should be measured while the chamber is operating in a continuous HEAT
mode to ensure that the expected nominal voltage of either 208 V –5/+10% or
230 V
±
10% is present.
Control
Transformer
TR1
1 2 3 4
208 V - Wire T1 to 3
230 V - Wire T1 to 4
Figure 2-1 – Location of Input Configuration Terminals on the Electrical Sub Panel
