kozy heat Windim-WDM 56101 Installation And Operation Manual

DIRECT VENT GAS FIREPLACE
WARNING: This product must be installed by a
licensed plumber or gas fitter when installed in the Commonwealth of Massachusetts.
IMPORTANT: Installation of a CO detector is required in the fireplace room when installed in the Commonwealth of Massachusetts.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
IF YOU SMELL GAS: ◙ Do not light any appliance.
◙ Do not touch any electrical switch: do not use any phone in your building. ◙ Immediately call gas supplier from a neighbors phone. Follow the gas supplier instructions. ◙ If you cannot reach your gas supplier, call the fire department. ◙ Installation and service must be performed by a qualified installer, service agency or the gas supplier.
WARNING: If the information in these instructions are not followed exactly, a fire or
explosion may result, causing property damage, personal injury or loss of life.
This appliance may be installed in an aftermarket permanently located, manufactured (mobile) home, where not prohibited by local codes.
This appliance is only for use with the type (s) of gas indicated on the rating plate. A conversion kit is supplied with the appliance.
www.kozyheat.com
INSTALLATION
AND
OPERATION MANUAL
Quality Fireplaces for Life
DO NOT
DISCARD
INSTALLER: LEAVE THIS MANUAL WITH THE APPLIANCE. CONSUMER: RETAIN THIS MANUAL FOR FUTURE REFERENCE.
May - 2009
WDM-05-09-R05
CONGRATULATIONS!
We welcome you as a new owner of a Kozy Heat gas fireplace. Kozy Heat products are designed with superior components and materials and assembled by trained craftsmen who take pride in their work. The burner and valve assembly are 100% test-fired and the complete fireplace is thoroughly inspected before packaging to ensure that you receive a quality product. Our commitment to quality and customer satisfaction have remained the same for over 30 years. We offer a complete line of gas and wood fireplaces, unique cabinets and stylish accessories to compliment any décor. Adding a fireplace is one of the best ways to increase the value of your home and we are proud to offer a network of dealers throughout the country to help make your experience everything you imagine. We pride ourselves in being dedicated to not only function and reliability, but customer safety as well. We offer our continual support and guidance to help you achieve the maximum benefit and enjoyment from your Kozy Heat gas fireplace.
Jim Hussong Dudley Hussong President Board Chairman
INTRODUCTION
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.
Homeowner Reference Information
We recommend that you record the following information about your fireplace.
Model Name:______________________________ Date purchased/installed:____________
Serial Number:____________________________ Location on fireplace:_______________
Dealership purchased from:__________________ Dealer Phone:_____________________
Notes:_____________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
PAGE 1
TABLE OF CONTENTS
PAGE 2
INTRODUCTION
Introduction and Homeowner Reference Information 1
TABLE OF CONTENTS
Table of Contents 2
SAFETY INFORMATION
Safety Information 3
FEATURES
Features 4
COMMONWEALTH OF MASSACHUSETTS INFORMATION
Commonwealth of Massachusetts Information 5
SPECIFICATIONS
Fireplace Dimensions 6
Clearances 7
Windom Corner Cabinet Specifications 8
Components List 9
Installation Overview 9
Placement Clearance Requirements 9
MANTEL REQUIREMENTS
Mantel Requirements 10
FRAMING
Wall Enclosure Rough Opening 10
Vertical Terminations 11
Horizontal Terminations 11
PREPARE THE FIREPLACE
Nailing Flange Assembly and Installation 12
Glass Frame Assembly Removal 12
Glass Frame Assembly Installation 12
FAN INSTALLATION
WDM-028 Optional Fan Installation 13-14
GAS LINE CONNECTION
Gas Line Connection 15
THERMOSTAT / WALL SWITCH / REMOTE
Thermostat / Wall Switch / Remote 16
VENTING
Approved Venting 17
Horizontal Vent System Clearances 17
VENTING (cont.)
Min. / Max. Horizontal Vent System Information 17
Vertical Vent System Clearances 17
Min. / Max. Vertical Vent System Information 17
Horizontal / Vertical Combination Venting 17
Elbows 17
Restrictor Installation (prior to termination) 18
Horizontal Venting Illustrations 18
Corner Horizontal Venting Illustrations 19
Maximum Vertical Venting 20
Horizontal / Vertical Combination Venting Illustration 20
Termination Cap Location 21
Vertical Cap Requirements 22
LOG SET INSTALLATION
Log Set Installation 23
MILLIVOLT BOARD
Millivolt Board Removal 24
Millivolt Board Installation 25
GRILL SET
Grill Set Installation 26
Grill Set Removal 26
OPERATING INSTRUCTIONS
Valve and Pilot Assembly Components 27
Lighting and Shutdown Instructions 28-30
Pressure Testing 31
FINALIZING THE INSTALLATION
Burner Tube Venturi Adjustment / Troubleshooting 32
Restrictor Troubleshooting / Installation after Termination Completion 33
MAINTENANCE
Maintenance 34
TROUBLESHOOTING
Troubleshooting 35-37
REPLACEMENT PARTS LIST
Replacement Parts List 38
WARRANTY
Warranty 39-40
Installation and repair should be done only by a qualified service person. The appliance should be inspected by a qualified service person before use. Annual inspection by a qualified service person is required to maintain warranty. More frequent cleaning may be required due to excessive lint from carpeting, bedding materials, etc. It is imperative that control compartments, burners and circulation air passageways of the appliance be kept clean.
If this appliance is installed directly on carpeting, tile or other combustible material other than wood flooring, the appliance shall be installed on a metal or wood panel extending the full width and depth of the appliance.
Children and adults should be alerted to the hazards of high surface temperatures and should stay away to avoid burns or clothing ignition.
Young children should be carefully supervised when they are in the same room as the appliance.
Clothing or other flammable material should not be place on or near the appliance.
Adequate accessibility clearances for servicing and proper operation must be maintained.
This appliance must not share or be connected to a chimney flue serving any other appliance.
Keep area around the appliance clear of combustible materials, gasoline and other flammable vapor and liquids.
The flow of combustion and ventilation air must not be obstructed.
Due to high temperatures the appliance should be located out of traffic and away from furniture and draperies.
The glass front or any part removed for servicing the appliance must be replaced prior to operating the appliance. Work should be done by a qualified service technician.
Clean glass only when cool and only with non-abrasive cleansers.
Do not operate this appliance with the glass/frame assembly removed, cracked or broken. The glass assembly, Part #700-07T, shall only be replaced as a complete unit, as supplied by Hussong Mfg. Co., Inc. Replacement of the glass assembly must only be performed by a licensed or qualified service per­son. DO NOT SUBSTITUTE MATERIALS.
Do not strike or slam glass assembly.
Any safety screen or guard removed for servicing the appliance must be replaced prior to operating the appliance.
Under no circumstances should any solid fuel (wood, coal, paper or cardboard etc.) be used in this appliance.
Keep burner and control compartment clean.
Do not use this fireplace if any part has been under water. Immediately call a qualified service technician to inspect this appliance and to replace any part of the control system and any gas control which has been under water.
This fireplace has been tested to and complies with ANSI Z21.88a-2007·CSA 2.33a-2007·CSA P.4.1-02 “VENTED GAS FIREPLACE HEATERS” by OMNI-Test Laboratories, Portland, OR. Installation must conform with local building codes or in the absence of local building codes, with the National Fuel Gas Code, ANSIZ223.1/NFPA 54 - Current Edition, or the Natural or Propane Installation Code, CSAB149.1
SAFETY INFORMATION
PAGE 3
High efficiency
Zero clearance
High quality lifetime glass 17” x 30” (432 mm x 762 mm)
Quick latch glass frame assembly
Upper & lower grill (black)
Patented burner design
High - Low regulator
Patented log design
Refractory brick lining
Minnesota Energy Code compliant to 50 pascals
Automatic fan kit with variable speed control (2) - 75 CFM
Remote control or thermostat remote control
Wall mount thermostat / wireless wall mount thermostat
Decorative full door faces / screen doors in various styles and finishes
Rectangular valance
Interior / Exterior trim
Various grill designs and finishes
Each unit factory tested!
Tested by OMNI - Test Laboratories
Sealed combustion chamber with standing pilot ignition
Removable millivolt board with 30-second delay pilot
Automatic pressure relief glass system
Requires no electricity to operate (excluding fan)
Bedroom and mobile home approved
Fireplace Weight (as packaged for shipment) 131 lbs. (59.4 kg)
FEATURES
PAGE 4
STANDARD FEATURES
OPTIONAL FEATURES
WEIGHT
SAFETY FEATURES
COMMONWEALTH OF MASSACHUSETTS REQUIREMENTS
NOTE: The following requirements reference various Massachusetts and national codes not contained in this manual.
For all sidewall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:
INSTALLATION OF CARBON MONOXIDE DETECTORS
At the time of installation of the side wall horizontally vented gas fueled equipment, the installing plumber or gas-fitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the in­stalling plumber or gas-fitter shall observe that a battery operated or hard wired carbon monoxide detector is installed on each additional level of the dwell­ing, building or structure served by the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or attic, the hard wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated ca rbon monoxide detector with an alarm shall be installed.
APPROVED CARBON MONOXIDE DETECTORS
Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
SIGNAGE
A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print no less the one-half inch (1/2) in size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”.
INSPECTION
The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08 (2) (a) 1 through 4.
EXEMPTIONS
The following equipment is exempt from 248 CMR 5.08 (2) (a) 1 through 4:The equipment listed in Chapter 10 entitled “Equipmen t Not Required To Be Vented” in the most current edition of NFPA 54 as adopted by the Board; and Product Approved side wall horizontally vented gas fueled equipment in-
stalled in a room or structure separate from the dwelling, building or structure used in whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED
When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system design or ven ting system compo­nents with the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting sys tem shall include:
Detailed instructions for the installation of the venting system design or the venting system components; and
A complete parts list for the venting system design or venting system.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED
When the manufacturer of Product Approved side wall horizontally vented gas equipment does not provide the parts for venting the flue gases, but identi­fies “special venting systems”, the following requirements shall be satisfied by the manufacturer:
The referenced “special venting systems” instructions shall be included with the appliance or equipment installation instructions and;
The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall include a parts list and detailed installation instructions.
A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation.
PAGE 5
FIREPLACE DIMENSIONS
LETTER KEY A B C D E F G H I
DESCRIPTION Height Width Depth Glass Frame
Height
Stand-off Height Vent Center
from floor
Vent Center to
unit top
Back to Gas Line
Hole Center
(left side)
Floor to Gas Line
Hole Center
FIREPLACE
DIMENSIONS
INCHES 32 36 11 19-1/2 2 22-3/8 4-1/4 4-3/4 2-3/4
MILLIMETERS 812 914 279 495 51 568 108 121 70
SPECIFICATIONS
NOTE: OTHER CLEARANCES APPLY. ALL CLEARANCES MUST BE MAINTAINED.
CAUTION: STAND-OFF BRACKETS ARE NOT LOAD BEARING.
PAGE 6
FRONT
RIGHT
32"
812mm
11"
279mm
19
1
2
"
495mm
2"
51mm
5
1
4
"
133mm
3
5
8
"
92mm
2
3
4
"
70mm
23
3
8
"
594mm
11"
279mm
23
3
8
"
594mm
FRONT
RIGHT
LEFT
32"
812mm
11"
279mm
19
1
2
"
495mm
1
3
4
"
44mm
2"
51mm
1
1
8
"
29mm
2
3
4
"
70mm
4
3
4
"
121mm
5
1
4
"
133mm
3
5
8
"
92mm
2
3
4
"
70mm
23
3
8
"
594mm
RIGHT
2"
51mm
5
1
4
"
133mm
3
5
8
"
92mm
2
3
4
"
70mm
BACK
22
3
8
"
568mm
23
3
8
"
594mm
30
1
8
"
765mm
A
H
D
F
E
I
C
B
G
Top back and sides of unit - 0” (0mm)
From unit top stand-offs - 0” (0mm)
To flooring - 0” (0 mm)
Unit side to adjacent sidewall - 0” (0 mm)
From venting - Horizontal - Top: 1-1/2” (38 mm) at wall pass-thru Bottom and sides: 1” (25 mm)
Vertical - All sides: 1” (25 mm)
Top of unit to 3/4” (19 mm) trim - 1” (25 mm)
Top of unit to 10” (254 mm) mantel - 9” (229 mm)
See additional mantel clearance configurations on page 10 of this installa­tion manual.
SPECIFICATIONS
WARNING: TOP STAND-OFF BRACKETS MUST BE ATTACHED TO FIREPLACE. DO NOT REMOVE.
CLEARANCES
NOTE: OTHER CLEARANCES APPLY. ALL CLEARANCES MUST BE MAINTAINED.
CAUTION: STAND-OFF BRACKETS ARE NOT LOAD BEARING.
1” (25 mm) clearance
1” (25 mm)
clearance
sides & bottom
1” (25 mm) clearance sides & bottom
1-1/2” (38 mm) clearance top
1” (25 mm)
clearance sides
1” (25 mm) clearance sides
11-1/4
(286 mm)
11-1/4
(286 mm)
36-1/2
(927 mm)
36-1/2
(927 mm)
22-3/8
(568 mm)
NOTE: 1/4” (6 mm) expansion space included in dimensions. 1/2” ( 13 mm) wall materials included in dimensions where applicable.
36-1/2
(927 mm)
PAGE 7
1” (25 mm) clearance sides
1” (25 mm)
clearance sides
1” (25 mm)
2-1/4”
(57 mm)
54-3/4”
(1391 mm)
35-5/8”
(905 mm)
SPECIFICATIONS
FIREPLACE POSITIONING (IF USING WINDOM CORNER CABINET)
WINDOM CORNER CABINET DIMENSIONS
1” (25 mm) clearance at sides
1” (25 mm) clearance at sides 1” (25 mm) clearance at sides
1” (25 mm) clearance at sides
1” (25 mm)
2-1/4”
(57 mm)
32”
(813 mm)
5-1/4”
(133 mm)
37-3/4”
(959 mm)
1” (25 mm)
2-1/4”
(57 mm)
5-1/2”
(140 mm)
38-3/8”
(975 mm)
32-5/8
(829 mm)
NOTE: 1” (25 mm) clearance for vent system framing to
finished wall and 2-1/4” (57 mm) from vent pipe to finished wall are required.
PAGE 8
MODEL #56101 COMPONENTS LIST
(#WDM-770) - Millivolt Board Assembly with 18” Flexible Gas Line attached
(#700-203) - Manual Gas Shut-off Valve
(#OCK-035) - Burner Tube
(#WDM-G900) - Refractory Set
(#WDM-50B) - Log Package
(#936-005) - Glass Valance
(#700-07T) - Glass with Gasket
(#OCK-S55A) - LP Conversion Kit
(#600-083) - Receptacle / Speed Control Assembly with (3) Wire Nuts
(#900-085) - 4” Restrictor Plate
1. Frame an opening for the fireplace, allowing for vent installation and type of installation.
2. If masonry (optional) will be used, prepare foundation for the masonry load. A lintel is required to support the added weight above the fireplace.
3. Attach nailing flanges to fireplace.
4. Insert fireplace into framing.
5. Install the hearth (if applicable).
6. Complete the gas line installation.
7. Complete the electrical hook-up. Install any standard or optional electrical components at this time.
8. Complete the venting installation.
9. Secure fireplace to flooring through holes located in the outer box bottom and to framing with nailing flanges. Verify all clearances at this point.
10. Install facing material, mantel or cabinetry, allowing room for optional full face doors, if applicable.
11. Install logs.
12. Install grills and optional decorative doors / faces.
13. Verify proper operation of fireplace and all components.
PLACEMENT CLEARANCE REQUIREMENTS
This fireplace must be installed on a level surface capable of supporting the fireplace and venting.
Fireplace must be placed directly on wood or non-combustible surface (not linoleum or carpet) extending the entire depth and width of fireplace.
Due to high surface temperatures, fireplace should be located out of traffic and away from furniture and draperies.
This fireplace may be installed in a bedroom.
Please be aware of the large amount of heat this fireplace will produce when determining a location.
SPECIFICATIONS
INSTALLATION OVERVIEW
NOTE: The qualified installer should follow the procedure best suited for the installation.
PAGE 9
Determine the exact position of your fireplace, including hearth height, width, and depth, (if applicable). If possible, place fireplace in such a manner that the vent termination will be placed between two studs, eliminating the need for additional framing.
WARNING: Install fireplace on hard metal or wood surface extending the full width and depth of fireplace. Minimum plat­form size: 36” (984 mm) wide x 11” (610mm) deep.
FIRE HAZARD: Do NOT install directly on carpeting, vinyl, or any combustible material other than wood.
If masonry is to be used (optional), prepare the necessary foundation for the masonry load. When masonry construction is being used, a lintel (#617) must be used over the top of fireplace to support the added weight.
FRAMING
WALL ENCLOSURE ROUGH OPENING
IMPORTANT: Framing dimensions should allow for wall cover­ing thickness and fireplace facing materials. If using a hearth, adjust rough opening size as necessary to maintain at least the minimum clearance requirements.
IMPORTANT: NON-COMBUSTIBLE FACING MATERIAL MAY BE APPLIED OVER (BUT NOT DIRECTLY TO) FIREPLACE FACE. THIS WILL PREVENT THE FACING MATERIAL FROM FALLING OFF DUE TO EXPANSION OF THE FACE WHEN HEATED. DO NOT OBSTRUCT THE FLOW OF VENTILATION AIR.
Build hearth to desired size and height. If a hearth extension is desired, combustible material may be used.
NOTE: Provide adequate clearance in front of fireplace to oper­ate lower grill, open and close optional decorative doors / full door faces, access the control valve, installation of gas line, fan, etc.
NOTE: Consider height of hearth finish material (stone, brick, etc.) when building fireplace platform. The bottom of the fireplace must be level with finished hearth to allow for lower grill operation and proper fit of optional
decorative full door faces.
WARNING: DO NOT OBSTRUCT UPPER AND LOWER GRILL OPENINGS. ROOM AIR ENTERS THROUGH THE LOWER PASSAGE, IS HEATED AND EXITS THROUGH THE
UPPER PASSAGE. BLOCKING THESE PASSAGES MAY RESULT IN OVERHEATING, CREATING A POTENTIALLY HAZARDOUS SITUATION.
PAGE 10
32-1/4”
(819 mm)
36-1/2”
(927 mm)
11-1/4”
(286 mm)
MANTEL REQUIREMENTS
(APPLIES TO BOTH HORIZONTAL AND VERTICAL VENTING TERMINATIONS)
32-1/4” (819 mm) High x 36-1/2”(927 mm) Wide x 11-1/4” (286 mm) Deep.
Follow vent pipe manufacturer‟s installation instructions for horizontal terminations. Include the required 1-1/2” (38 mm) top clearance (at wall pass-thru) and 1” (25 mm) sides and bottom clearances for approved rigid vent systems.
CAUTION: Due to high temperatures, this fireplace should be located out of traffic areas and away from furniture and draperies.
HORIZONTAL TERMINATIONS
Follow vent pipe manufacturer‟s installation instructions for vertical terminations. A minimum 1” (25 mm) clearance on all sides of vertical vent pipe must be maintained.
VERTICAL TERMINATIONS
FRAMING
IMPORTANT: Vent cap location must be in compli­ance with the guidelines on page #21 of this manual.
IMPORTANT: To achieve the minimum venting requirements, a minimum of 26” (660 mm) from the floor or hearth the fireplace is setting on to the top of vent pipe is required.
IMPORTANT: WALL PASS-THRU REQUIRED FOR ALL HORIZONTAL RUNS. REFER TO VENT MANUFACTURER‟S TO DETERMINE WHICH PASS-THRU WILL WORK BEST FOR YOUR APPLICATION AND WALL THICKNESS.
PAGE 11
CAUTION: Cold air transfer area. The surrounding fireplace chase must comply with all clearances as outlined in this manual and be con­structed in compliance with local building codes. Outside walls should be insulated to prevent cold air from entering room.
1-1/2” (38 mm) clearance at top for wall pass-thru
26” (660 mm) min.
to top of vent pipe
TYPICAL HORIZONTAL TERMINATION
1-1/2” (38 mm) from inside framing to stud wall
39” (991 mm) to
top of framing
KOZY HEAT CORNER CABINET FRAMING
Refer to vent pipe manufacturer‟s
instructions for specific height (H)
and width (W) framing dimensions.
PREPARE THE FIREPLACE
PAGE 12
REMOVE GLASS FRAME ASSEMBLY
A. Locate the spring-loaded handles securing glass frame assembly at the bottom of firebox.
B. Pull bottom handles out and „down‟ to release glass frame assembly bottom.
C. Pull bottom of glass frame assembly out and lift up off tabs at top of firebox.
INSTALL GLASS FRAME ASSEMBLY
A. Place glass frame assembly top over tabs at top of firebox.
B. Pull bottom handles out and „up‟ to secure glass frame assembly bottom.
WARNING: DO NOT OPERATE THIS FIRE­PLACE WITH THE GLASS REMOVED, CRACKED OR BROKEN. REPLACEMENT
OF GLASS ASSEMBLY, #700-07T SHOULD BE DONE BY A LICENSED OR QUALIFIED SERVICE PERSON.
WARNING: DO NOT REMOVE GLASS ASSEMBLY WHEN HOT!
The upper grill must be removed and the lower grill opened prior to removing glass frame assembly.
CAUTION: NEVER PERMANENTLY REMOVE THESE ASSEMBLIES FROM THE FIREPLACE - THEY MUST BE SECURED IN PLACE REGARDLESS OF FINISH MATERIAL USED.
FRAMING STUD
NAILING FLANGE
FRAMING STUD
1/4” (6mm) CLEARANCE
FRONT VIEW
TOP VIEW
1/4” (6mm)
CLEARANCE
NAILING FLANGE ASSEMBLY & INSTALLATION
1. Remove the (4) nailing flanges from fireplace sides.
2. With the 1/4” (6 mm) stand-offs on the nailing flanges facing away from fireplace, align nailing flange with the holes on the outside corners of fireplace . Secure with screws (provided in installation manual parts packet) through the slots in the nailing flanges.
3. Bend perforation on nailing flange until parallel with fireplace face. Do not bend toward fireplace face.
4. Position framing stud against the 1/4” (6 mm) stand-off located on the backside of the nailing flange and secure with nails or screws.
NOTE: Depending on facing material, tabs can be adjusted forward or back up to 1/2” (13 mm).
STAND-OFF
NAILING FLANGE
Loading...
+ 28 hidden pages