Burnham MPC Installation And Operation Manual page 40

Install 1-13/16" lg. pieces on horizontal raw edges
at both ends of chaseway channel assembly. Install
4-11/16" lg. pieces to vertical chaseway channel
flanges inside primary junction box as shown in
Figure 24e.
5. Locate and install internal control/safety circuit
wiring harness. Start with harness end that has three
(3) connectors, insert connectors through rectangular
opening on front and rear of primary junction box.
Pull harness through J-box until second set of three
(3) connectors can be inserted through front opening
in J-box. Center connectors in primary J-box and
secure harness to chaseway using nylon wire tie No.
1, see Figure 24f.
Figure e: Internal Wiring Harness Components - Install Protective Edging
Figure f: Internal Wiring Harness Components - Install and Secure Harness to Chaseway
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Note: if sage Boiler control (sBc) is to be used
with boiler, refer to installation section of sage
Boiler control instruction Manual (located in
sage Boiler control Parts carton) at this time.
Review installation section of sBc manual in its
entirety and keep on hand during assembly of
boiler. installation of sBc sensors and wiring
is much easier when it is done in parallel with
installation of MPc internal wiring harness and
jacket panels.
Pull on harness to remove slack in J-box, secure
harness to end of chaseway channel using wire tie
No. 2 as shown in Figure 24f.