12 Zone Upgrade Kit Installation - Graco Therm-O-Flow 20 Instructions - Parts Manual

12 Zone Upgrade Kit Installation

1. Disconnect the plug from the power outlet or turn
off the Circuit Breaker for incoming power.
2. Place the grounding wrist strap (7) over your wrist
and secure the other end to a grounded surface.
3. Set the kit's MZLP (1) rotary switch to "3" on a
primary system or "7" on a secondary system.
4. Remove the screws (B), plate (A), and the gasket (C)
from the system. Use the screws (2) to install the
MZLP (1) on to the system as shown.
NOTE: The new MZLP (1) will be referred to as MZLP 3,
and the other two that came with the system will be
referred to as MZLP 1 and MZLP 2.
5. Open the electrical enclosure door.
NOTE: Do not force the electrical connection. Minimal
force is required to seat the connector. If resistance is
felt, stop, and verify the connector orientation.
6. Connect the cable (4) to the J3 connector on MZLP
2 and the J6 connector on MZLP (1). Remove the
existing power cable from MZLP 2 J2 and AWB J5
connector.
7. Connect the power harness (6) to MZLP 2 and the
MZLP 3 J2 connector and the J5 connector on the
AWB.
8. See Install Heated Hose, page 17, to connect a
heated hose or fluid control device.
9. To ensure your system has the latest software,
insert the token (8) into the ADM. See Update
Software, page 60.
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Accessories and Kits
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