Blower motor fuses single-phase motors | Middleby Marshall PS555

SECTION 3 - SERVICING COMPONENTS

B. PS360-series ovens

All PS360-series ovens are equipped with two blower motors.

•All gas ovens have motors rated at 230V, single-phase.

•All electric ovens built before 8/02 have three-phase motors.

•All electric ovens built 8/02 or later that operate on a supply voltage of 208-240V have single-phase motors.

•All electric ovens built 8/02 or later that operate on supply voltages above 240V have three-phase motors.

Blower motors are protected by:

•A built-in thermal overload protection device.

•For ovens with single-phase blower motors: Two 9A fuses. Fuse location is shown in Figure 35.

•For ovens with three-phase blower motors: Three 5A fuses. Fuse location is shown in Figure 36.

In addition, each motor contains a centrifugal safety switch that prevents the burner/heating elements from activating if either motor is not operating. See Blower Motor Centrifugal Safety Switch on Page 80.

The blower wheel is directly connected to the motor shaft. A heat slinger, also mounted on the motor shaft, helps to keep heat away from the motor bearings. If the motor is stopped when the temperature in the compartment is over 180°F/82°C, the bearings can be damaged.

1. Part number reference

Blower motors

Part Number Description

27381-0023 1 Ph, 1/3 hp (PS310, -314, -360, -360S)

27381-0024 3 Ph, 1/3 hp (PS310, -314, -360)

27381-0054 1 Ph, 1/4 hp (PS360Q)

27381-0075	1 Ph, 1/2 hp (PS360WB)

31432	1 Ph, 1 hp (PS360EWB, -WB70)
Blower wheels
Part Number	Part Number
(clockwise) (counter-clockwise) Description
22523-0002	22523-0003	9-3/16” / 233mm dia. (PS310, -314,
		-360, -360Q, -360S, -360WB)

35603	35604	9-1/8” / 232mm dia. (PS360EWB)
36014	36015	8-1/4” / 210mm dia. (PS360EWBQ)

31599	31600	9-7/8” dia. / 251mm (PS360WB70)
Other components
Part Number	Description
27396-0005	Heat slinger

42400-0101 Blower wheel puller tool

2.Blower balancing

All blower wheels are balanced at the factory. Any blower wheel found to be out of balance should be re- placed. Vibration from an out-of-balance wheel can cause poor baking and premature motor bearing fail- ure. Note that vibrations can also be caused by other sources, including defective motor bearings and loose motor mounting bolts.

Figure 35

Blower motor fuses - single-phase motors

Left motor	Right motor
fuses - 9A	fuses - 9A

Control

fuse - 5A

Figure 36

Blower motor fuses - three-phase motors

Left motor	Right motor
fuses - 5A	fuses - 5A

Control

fuse - 5A

Transformer fuses

(480V electric ovens only)

PS224 PS310, PS220, PS555, PS200, PS360 specifications

The Middleby Marshall PS555 is a standout commercial pizza oven renowned for its performance, efficiency, and advanced technologies. Designed with the modern pizzeria in mind, the PS555 delivers exceptional cooking results while maximizing energy efficiency and throughput.

One of the key features of the PS555 is its innovative cooking technology, which incorporates both convection and radiant heat. This unique combination ensures that pizzas are cooked evenly and quickly, achieving a perfectly crispy crust and evenly melted cheese every time. The oven’s high-speed air impingement system accelerates cooking times, allowing pizzerias to serve more customers in less time without compromising quality.

The PS555 is designed with a spacious cooking chamber that can accommodate multiple pizzas simultaneously. With its ability to fit pizzas up to 18 inches in diameter, the oven is ideal for establishments with high demand. Additionally, the adjustable conveyor speed allows operators to customize the cooking time based on their specific menu items, enhancing versatility and productivity.

Energy efficiency is a hallmark of the Middleby Marshall PS555. The oven utilizes advanced insulation materials to minimize heat loss, ensuring that it operates at optimal temperatures while consuming less energy. This efficiency not only reduces operating costs but also contributes to a more sustainable kitchen environment.

User-friendly controls make it simple for operators to manage the cooking process. The PS555 features digital controls with programmable settings, enabling quick adjustments to temperature and cooking time. This ensures consistent quality across different shifts and helps maintain product standards while simplifying staff training.

Durability is another defining characteristic of the PS555. Built with high-quality materials, the oven is designed for heavy use in busy commercial kitchens. Its stainless steel construction ensures resistance to wear and tear, making it a worthwhile investment for any pizzeria.

In summary, the Middleby Marshall PS555 pizza oven is a high-performance piece of equipment that combines advanced cooking technologies, efficiency, and durability. Its ability to deliver consistently excellent results while streamlining operations makes it an essential asset for any pizza business aiming to enhance its productivity and customer satisfaction.

Middleby Marshall PS555, PS570, PS200 Blower motor fuses single-phase motors, PS360-series ovens

Models: PS224 PS310 PS220 PS555 PS200 PS360 PS570