Initial Startup - Unitrol 8400 Manual

UNITROL MODEL 8400, 8401, 8406, 8450, 8451, 8456
See photo on page 15 to locate warning lights that are used in this
INITIAL STARTUP section.
NEVER TOUCH ANY WIRE CONNECTIONS UNTIL
YOU ARE SURE POWER HAS BEEN
DISCONNECTED. USE A METER OR VOLTAGE
TESTER TO BE SURE NO VOLTAGE EXISTS ON
THESE WIRES BEFORE ENTERING THE WIRING
COMPARTMENT.
1. Before turning system on, connect the PHASE SEQUENCE TESTER instrument provided
with this chiller to incoming power lines L1 (RED), L2 (YELLOW), and L3 (BLUE) on the
RIGHT MODULE at the power connection block.
2. Turn the ON/OFF switch to OFF.
3. Turn the customer fused disconnect bringing power into the RIGHT MODULE ONLY.
4. Check the Phase Sequence Tester. The R rotation light should be ON, and all three phases
should be ON.
a. If the test shows the rotation to be L, Turn off the incoming power and interchange
wires L1 and L2 coming into this module.
b. Turn power on again and be sure that the rotation is R.
5. POWER UP PROCEDURE:
a. MODULE 1: Turn the ON/OFF switch to the ON position. The temperature controller
and water pump should turn on.
6. The temperature controller should be on, and the water pump should be operating. Because
you will be filling all of the outside pipes, it is possible that the water tank will drain down. If
this happens, stop the chiller until the makeup valve has filled the tank. Continue to do this
until the water tank remains full.
DO NOT ALLOW THE PUMP TO GO DRY. OPERATING A
CHILLER PUMP WITHOUT AT LEAST 15" OF WATER
DEPTH IN THE WATER TANK CAN BURN OUT THE
PUMP SEALS.

INITIAL STARTUP

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