Chapter 2 – Installation
TestEquity 1007S Temperature Chamber
Page 2-3
Input Power Configuration
Overview
This chamber is designed to be easily configured for operation from either 208 V or 230 V,
60 Hz, Single Phase power source. 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 particular 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 the COOL mode to
ensure that the expected nominal voltage of either 208 V –5/+10% or 230 V
±
10% is present. Operation below 198 V or greater than 253 V requires
internal transformers, which can be supplied for a nominal charge.
Figure 2-1 – Location of Input Configuration Terminals on the Electrical Sub Panel
Disconnect
Switch
Control
Transformer
TR1
Input
L1 L2
Ground
Lug
H3
Terminal Strip
3 4