SECTION 3 - SERVICING COMPONENTS

V. BLOWERS

A. PS200-series ovens

All PS200 ovens are equipped with one 1/3hp blower mo- tor. The motor indirectly drives a pulley on the shaft of the blower fan with a fan belt.

Two main designs exist for the PS200 indirect fan drive assembly:

•Early design, used through 6/90. This design used 1/2” (12.7mm) bore flange mount bearings and a 1/2” (12.7mm) diameter blower fan shaft. See Figure 25.

•Current design, used 7/90 and later. This design uses 5/8” (15.9mm) pillow block bearings and a 5/8” (15.9mm) diameter blower fan shaft. See Figure 26.

Blower motors on both versions are rated for 208-240V, single-phase, and are protected by:

•A built-in thermal overload protection device.

•Two 9A fuses on the inside of the machinery compart- ment door. Fuse location is shown in Figure 27.

In addition, the blower fan is protected by an air pressure saftety switch that prevents the burner/heating elements from activating if the fan is not rotating. See Air Pressure Safety Switch on Page 81.

1.Part number reference Early version components

NOTE: If an early-version PS200-series oven has a failed fan shaft, upgrade the oven to the current drive assembly using Kit P/N 49810-0121.

Part Number Description

22230-0072

Pulley, 1/2” / 12.7mm bore

 

 

22071-0019

Bearing, 1/2” / 12.7mm bore, flange

 

mount

 

 

37900-0094

Fan shaft alignment tool (early)

 

 

27381-0066

Motor, 1/3 hp, 200-240V, 50/60Hz ,1 Ph

 

 

22181-0034

Fan belt

 

 

Current version components

Part Number Description

35900-0232

Shaft, blower fan

 

 

22230-0073

Pulley, 5/8” / 15.9mm bore

22072-0025

Bearing, 5/8” / 15.9mm bore, pillow

 

block mount

27399-0003

Blower fan, 16” / 0.4m diameter

 

 

37900-0106

Fan shaft alignment tool (current)

 

 

49810-0121

Indirect drive upgrade kit (upgrades

 

early-style version to current version)

 

 

49810-0018

Fan shaft service kit (includes 2 bear-

 

ings, 1 shaft, and alignment tool )

27381-0066

Motor, 1/3 hp, 200-240V, 50/60Hz ,1 Ph

22181-0034

Fan belt

 

 

Figure 25

Early-style PS200 indirect drive assembly

Direction of rotation

(viewed from rear of oven)

Figure 26

Current PS200 indirect drive assembly

Direction of rotation

(viewed from rear of oven)

Figure 27

Blower motor fuses

Blower

motor fuses

Control

fuse

68

Page 68 Page 70
Page 69
Image 69
Middleby Marshall PS555, PS570 Early-style PS200 indirect drive assembly, Current PS200 indirect drive assembly, Blowers
Page 68 Page 70

PS224 PS310, PS220, PS555, PS200, PS360 specifications

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