Milnor 6458, Installation Manual

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Pellerin Milnor Corporation
CAUTION:
Machine Damage Hazards —
Allow steam coil to preheat and purge con-
densate before operating dryer or conditioner.
�
Verify that the facility boiler has operated at least 15 minutes before
the dryer receives the first load each day.
CAUTION:
Machine Damage Hazards — Steam coil antifreeze is drained at the fac-
tory but some residue may remain.
�
Route the steam condensate return line to the sewer for the first hour of
operation to prevent residual antifreeze from entering the boiler system.
1.2. Heating Fuel and Air Intake Requirements
BNDUUI01.C07 0000243233 A.7 A.4 1/2/20 1:40 PM Released
These requirements are given in the following two tables. The first table covers models in produc-
tion on or after January 1, 2016. The second table covers models that were no longer in produc-
tion as of January 1, 2016.
The nameplate designations for certain newer dryer models (the first table) changed from a 5-dig-
it numeric prefix to a 4-digit numeric prefix, but the specifications remain the same. If you have
one of these models, your nameplate may show 5050_ or 50050_, 6450_ or 64050_, 6458_ or
64058_, 6464_ or 64064_.
Newer gas dryer models (the first table) include the 5050_ (or 50050_) models which are only
available with the air heat burner design, the 6450_ (or 64050_), 7676_, and 8282_ models,
which are only available with the ratio air burner design, and the 6458_ (or 64058_) and 6464_
(or 64064_) models, which are available with either burner design. Older dryer models (the sec-
ond table) were only available with air heat or older burner design
Table 1. Gas, Steam, and Air Intake - Newer Dryer Models
Model number prefix
5050_
50050_
6450_
64050_
6458_
64058_
6464_
64064_ 7676_ 8282_
Capacity basis - lb (kg) 150 (68) 220 (100) 250 (113) 300 (136) 500 (227) 630 (2860)
Gas inlet with air heat burner (natural gas and propane models)
Maximum Btu/hr (kcal/
hr) at x" (mm) water
column
950,000
(240,000)
@ 13.5"
(343)
1,500,000
(378,246)
@ 13.5"
(343)
1,800,000
(453,000)
@ 13.5"
(343)
1,800,000
(453,000)
@ 13.5"
(343)
n.a. n.a.
Average Btu/hr (kcal/
hr) at x" (mm) water
column
495,000
(124,738)
@ 13.5"
(343)
725,000
(182,819)
@ 13.5"
(343)
825,000
(207,900)
@ 13.5"
(343)
990,000
(249,480)
@ 13.5"
(343)
n.a. n.a.
Gas inlet with ratio air burner (natural gas and propane models)
Maximum Btu/hr (kcal/
hr) at x" (mm) water
column
n.a.
1,300,000
(327,800)
1,800,000
(453,000)
1,800,000
(453,000)
3,000,000
(756,000)
pending
Utility Requirements For Gas, Steam and Thermal Oil Dryers
59