Henny Penny PFG-691 Technical Manual page 136

Plumbing Inspection
Objective

Inspect the plumbing from the deadweight to the condensation box and from the outlet in the
fry pot, through the pressure solenoid to the condensation box are free and clear from
obstruction (figures 1&2). Obstructions can be detected during the lid lock engagement /
disengagement procedure. During this test, if pressure exceeds 12 psi, this is a sign that the
deadweight would need to be cleaned and or deadweight plumbing is obstructed and would
need to be cleaned or replaced. If the pressure gauge does not read zero at the end of the test,
this is a sign that the pressure solenoid or related plumbing would need to be cleaned or if
damaged or obstructed bad enough, components would need to be replaced. If any
obstructions are detected, follow the procedure to remove obstruction below.

Why is this important? Keeping this plumbing free and clear from obstruction keeps product
quality high. If there are issues with deadweight plumbing, product issues will result. Set points
are designed around 12psi. If the pressure solenoid or related plumbing is obstructed, product
will overcook as the time for the pressure to reach zero increases the amount of time product is
in the fryer.
Figure 1.
Plumbing as seen from the front of the fryer.
A Fry Pot Outlet
B Plumbing to Solenoid Valve
C Deadweight Valve
D Deadweight Plumbing
1219 US 35 West P.O. Box 60 Eaton, OH 45320 (937)456-8400 Fax (937)456-8402 www.hennypenny.com
C
D
B
A
Plumbing Cleaning Procedure
1. Remove rear cover of fryer.
For Deadweight Obstructions
(pressure too high)
2. Clean the outlet of fry pot to
the deadweight valve with a
flexible wire brush (figure 1).
Inspection 11
Rev. A