CleaverBrooks ProFire Q Series, Installation Operation & Maintenance

Page: 22 / 88

Installation
2-4
750-437
Q Series Full Modulation
2.6 — Refractory Front Plate Requirements
A dry oven refractory is required only to protect surfaces not adequately protected by free circulating water. Basic
objectives of refractory installation include:
• Provide adequate combustion space
• Avoid flame impingement
• Protect surfaces not adequately water cooled
• Seal openings
Insulation should be provided between the refractory and the boiler base. Mineral wool or other material not
likely to settle is preferred. Insulation should be used between the refractory and front plate. Firebrick or
insulating firebrick should be set in high temperature bonding mortar with provision for expansion.
Refer to
Figure 2-3 for refractory construction guidelines.
FIGURE 2-3.
Q Series Refractory Dimensions
DIMENSION SIZE-6 SIZE-8
"A" 8.88 10.88
"B" 6.75 8.75
"C"
"D"
"E"
"F"
"G"
"H"
"I"
SIZED TO FIT BOILER
A
A
"I"
3.31
45°
"A"
45°
90° 4X
P
3/8 STUDS
"B"
"C"
"D"
"E"
"F"
"G" x
P
"H"
4.00
MIN.
1.25
710-00897-000
! Caution
To prevent leakage of combustion gases, the gasket must be resilient enough to seal any uneven areas
between the burner and the front plate.